repo_id stringlengths 22 103 | file_path stringlengths 41 147 | content stringlengths 181 193k | __index_level_0__ int64 0 0 |
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data/mdn-content/files/en-us/mozilla/firefox/releases/3 | data/mdn-content/files/en-us/mozilla/firefox/releases/3/svg_improvements/index.md | ---
title: SVG improvements in Firefox 3
slug: Mozilla/Firefox/Releases/3/SVG_improvements
page-type: guide
---
{{FirefoxSidebar}}
Firefox 3 offers improved [Scalable Vector Graphics](/en-US/docs/Web/SVG) (SVG) support over prior versions of Firefox. While these features are documented elsewhere, this article serves ... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/3 | data/mdn-content/files/en-us/mozilla/firefox/releases/3/wai_aria_live_regions_api_support/index.md | ---
title: WAI ARIA Live Regions/API Support
slug: Mozilla/Firefox/Releases/3/WAI_ARIA_Live_Regions_API_Support
page-type: guide
---
{{FirefoxSidebar}}
> **Warning:** These notes are for developers of screen readers. Developers should use the [ARIA live regions developer documentation](/en-US/docs/Web/Accessibility/A... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/3 | data/mdn-content/files/en-us/mozilla/firefox/releases/3/templates/index.md | ---
title: Templates in Firefox 3
slug: Mozilla/Firefox/Releases/3/Templates
page-type: guide
---
{{FirefoxSidebar}}
Templates have been significantly improved in Firefox 3. The key improvement allows the use of [custom query processors](/en-US/docs/How_to_implement_a_custom_XUL_query_processor_component) to handle o... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/3 | data/mdn-content/files/en-us/mozilla/firefox/releases/3/site_compatibility/index.md | ---
title: Site compatibility for Firefox 3
slug: Mozilla/Firefox/Releases/3/Site_compatibility
page-type: guide
---
{{FirefoxSidebar}}
This page tries to give an overview of the changes between [Gecko](/en-US/Gecko) 1.8 and Gecko 1.9, that could possibly affect websites in their behavior or rendering.
See also [Fir... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/3 | data/mdn-content/files/en-us/mozilla/firefox/releases/3/notable_bugs_fixed/index.md | ---
title: Notable bugs fixed in Firefox 3
slug: Mozilla/Firefox/Releases/3/Notable_bugs_fixed
page-type: guide
---
{{FirefoxSidebar}}
This article offers a list of important bug fixes offered by Firefox 3 that are not necessarily obvious in the documentation.
- if an error occurs parsing an overlay, the overlay is ... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/8/index.md | ---
title: Firefox 8 for developers
slug: Mozilla/Firefox/Releases/8
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
Firefox 8 was released on November 8, 2011. This article provides information both for [web developers](#changes_for_web_developers) and for add-on and [Mozilla project developers](#changes_for... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/8 | data/mdn-content/files/en-us/mozilla/firefox/releases/8/updating_add-ons/index.md | ---
title: Updating add-ons for Firefox 8
slug: Mozilla/Firefox/Releases/8/Updating_add-ons
page-type: guide
---
{{FirefoxSidebar}}
This article provides information on steps you need to take in order to update your existing add-on for compatibility with Firefox 8. See [Firefox 8 for developers](/en-US/docs/Mozilla/F... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/55/index.md | ---
title: Firefox 55 for developers
slug: Mozilla/Firefox/Releases/55
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
Firefox 55 was released on August 8, 2017. This article lists key changes that are useful for web developers.
## Changes for Web developers
### Developer Tools
- Added filtering of network... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/64/index.md | ---
title: Firefox 64 for developers
slug: Mozilla/Firefox/Releases/64
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 64 that will affect developers. Firefox 64 was released on December 11, 2018.
## Changes for web developers
### Developer tool... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/93/index.md | ---
title: Firefox 93 for developers
slug: Mozilla/Firefox/Releases/93
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 93 that will affect developers. Firefox 93 was released on October 5, 2021.
> **Note:** See also [Lots to see in Firefox 93](ht... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/102/index.md | ---
title: Firefox 102 for developers
slug: Mozilla/Firefox/Releases/102
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 102 that will affect developers. Firefox 102 was released on June 28, 2022.
## Changes for web developers
### HTML
No notab... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/5/index.md | ---
title: Firefox 5 for developers
slug: Mozilla/Firefox/Releases/5
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
Firefox 5, based on Gecko 5.0, was released on June 21, 2011. This article provides links to information about the changes that affect developers in this release.
## Changes for web developers... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases/5 | data/mdn-content/files/en-us/mozilla/firefox/releases/5/updating_add-ons/index.md | ---
title: Updating add-ons for Firefox 5
slug: Mozilla/Firefox/Releases/5/Updating_add-ons
page-type: guide
---
{{FirefoxSidebar}}
This article provides an overview of the changes you may need to make to your add-ons in order for them to work properly in Firefox 5. You can find a complete list of developer-related c... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/87/index.md | ---
title: Firefox 87 for developers
slug: Mozilla/Firefox/Releases/87
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 87 that will affect developers. Firefox 87 was released on March 23, 2021.
> **Note:** See also [In March, we see Firefox 87](h... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/84/index.md | ---
title: Firefox 84 for developers
slug: Mozilla/Firefox/Releases/84
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 84 that will affect developers. Firefox 84 was released on December 15, 2020.
> **Note:** See also [And now for … Firefox 84](h... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/109/index.md | ---
title: Firefox 109 for developers
slug: Mozilla/Firefox/Releases/109
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 109 that will affect developers. Firefox 109 was released on January 17, 2023.
## Changes for web developers
### HTML
- The... | 0 |
data/mdn-content/files/en-us/mozilla/firefox/releases | data/mdn-content/files/en-us/mozilla/firefox/releases/74/index.md | ---
title: Firefox 74 for developers
slug: Mozilla/Firefox/Releases/74
page-type: firefox-release-notes
---
{{FirefoxSidebar}}
This article provides information about the changes in Firefox 74 that will affect developers. Firefox 74 was released on March 10, 2020.
## Changes for web developers
### Developer tools
... | 0 |
data/mdn-content/files/en-us/mozilla | data/mdn-content/files/en-us/mozilla/add-ons/index.md | ---
title: Add-ons
slug: Mozilla/Add-ons
page-type: landing-page
---
{{AddonSidebarMain}}
Add-ons allow developers to extend and modify the functionality of Firefox. They are written using standard Web technologies - JavaScript, HTML, and CSS - plus some dedicated JavaScript APIs.
Among other things, an add-on could... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons | data/mdn-content/files/en-us/mozilla/add-ons/contact_us/index.md | ---
title: Contact us
slug: Mozilla/Add-ons/Contact_us
page-type: guide
---
{{AddonSidebar}}
Use the links below to get help, to keep up to date with add-ons news, and to give us feedback.
### Add-ons forum
Use the [Add-ons Discourse forum](https://discourse.mozilla.org/c/add-ons/35) to discuss all aspects of add-o... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/index.md | ---
title: Browser extensions
slug: Mozilla/Add-ons/WebExtensions
page-type: landing-page
---
{{AddonSidebar}}
Extensions, or add-ons, can modify and enhance the capability of a browser. Extensions for Firefox are built using the WebExtensions API cross-browser technology.
The technology for extensions in Firefox is... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/work_with_the_cookies_api/index.md | ---
title: Work with the Cookies API
slug: Mozilla/Add-ons/WebExtensions/Work_with_the_Cookies_API
page-type: guide
---
{{AddonSidebar}}
With the Cookies API your extensions have access to capabilities similar to those used by websites to store and read cookies. The API's features give extensions the ability to store... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/anatomy_of_a_webextension/index.md | ---
title: Anatomy of an extension
slug: Mozilla/Add-ons/WebExtensions/Anatomy_of_a_WebExtension
page-type: guide
---
{{AddonSidebar}}
An extension consists of a collection of files, packaged for distribution and installation. In this article, we will quickly go through the files that might be present in an extension... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/safely_inserting_external_content_into_a_page/index.md | ---
title: Safely insert external content into a page
short-title: Insert external content
slug: Mozilla/Add-ons/WebExtensions/Safely_inserting_external_content_into_a_page
page-type: guide
---
{{AddonSidebar}}
There are times when you might want or need to include content from an external source in your extension. B... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/what_next/index.md | ---
title: What next?
slug: Mozilla/Add-ons/WebExtensions/What_next
page-type: guide
---
{{AddonSidebar}}
You'll now be ready to start turning your idea for a browser extension into reality. Before you start that journey, it's worth being aware of a few things that will help to make it a smooth one.
You can find mor... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/developing_webextensions_for_thunderbird/index.md | ---
title: Developing WebExtensions for Thunderbird
slug: Mozilla/Add-ons/WebExtensions/Developing_WebExtensions_for_Thunderbird
page-type: guide
---
{{AddonSidebar}}
You'll approach the coding of an extension for Thunderbird in the same way as you would for a Firefox extension; using a text editor or tool of your ch... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/interact_with_the_clipboard/index.md | ---
title: Interact with the clipboard
slug: Mozilla/Add-ons/WebExtensions/Interact_with_the_clipboard
page-type: guide
browser-compat:
- api.Clipboard
- webextensions.api.clipboard
---
{{AddonSidebar}}
Working with the clipboard in extensions is transitioning from the Web API {{domxref("Document.execCommand()","... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/differences_between_api_implementations/index.md | ---
title: Differences between API implementations
slug: Mozilla/Add-ons/WebExtensions/Differences_between_API_implementations
page-type: guide
---
{{AddonSidebar}}
The browser extensions API is an [emerging standard](https://browserext.github.io/browserext/). As a result, while it is supported by most major browsers... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/content_security_policy/index.md | ---
title: Content Security Policy
slug: Mozilla/Add-ons/WebExtensions/Content_Security_Policy
page-type: guide
---
{{AddonSidebar}}
Extensions developed with WebExtension APIs have a Content Security Policy (CSP) applied to them by default. This restricts the sources from which they can load code such as [\<script>]... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/extending_the_developer_tools/index.md | ---
title: Extend the developer tools
slug: Mozilla/Add-ons/WebExtensions/Extending_the_developer_tools
page-type: guide
---
{{AddonSidebar}}
> **Note:** This page describes the devtools APIs in Firefox 55. Although the APIs are based on the [Chrome devtools APIs](https://developer.chrome.com/docs/extensions/mv3/devt... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/what_are_webextensions/index.md | ---
title: What are extensions?
slug: Mozilla/Add-ons/WebExtensions/What_are_WebExtensions
page-type: guide
---
{{AddonSidebar}}
> **Note:** If you are already familiar with the basic concepts of browser extensions, skip this section to [see how extension files are put together](/en-US/docs/Mozilla/Add-ons/WebExtensi... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/index.md | ---
title: JavaScript APIs
slug: Mozilla/Add-ons/WebExtensions/API
page-type: landing-page
---
{{AddonSidebar}}
JavaScript APIs for WebExtensions can be used inside the extension's [background scripts](/en-US/docs/Mozilla/Add-ons/WebExtensions/Anatomy_of_a_WebExtension#background_scripts) and in any other documents b... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts/index.md | ---
title: contentScripts
slug: Mozilla/Add-ons/WebExtensions/API/contentScripts
page-type: webextension-api
browser-compat: webextensions.api.contentScripts
---
{{AddonSidebar}}
Use this API to register content scripts. Registering a content script instructs the browser to insert the given content scripts into pages... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts/registeredcontentscript/index.md | ---
title: contentScripts.RegisteredContentScript
slug: Mozilla/Add-ons/WebExtensions/API/contentScripts/RegisteredContentScript
page-type: webextension-api-type
browser-compat: webextensions.api.contentScripts.RegisteredContentScript
---
{{AddonSidebar}}
A `RegisteredContentScript` is returned by a call to {{WebExtA... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts/registeredcontentscript | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts/registeredcontentscript/unregister/index.md | ---
title: contentScripts.RegisteredContentScript.unregister()
slug: Mozilla/Add-ons/WebExtensions/API/contentScripts/RegisteredContentScript/unregister
page-type: webextension-api-function
browser-compat: webextensions.api.contentScripts.RegisteredContentScript.unregister
---
{{AddonSidebar}}
Unregisters the content... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/contentscripts/register/index.md | ---
title: contentScripts.register()
slug: Mozilla/Add-ons/WebExtensions/API/contentScripts/register
page-type: webextension-api-function
browser-compat: webextensions.api.contentScripts.register
---
{{AddonSidebar}}
Use this function to register one or more content scripts.
It accepts one parameter, which is an obj... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/index.md | ---
title: omnibox
slug: Mozilla/Add-ons/WebExtensions/API/omnibox
page-type: webextension-api
browser-compat: webextensions.api.omnibox
---
{{AddonSidebar}}
Enables extensions to implement customized behavior when the user types into the browser's address bar.
When the user focuses the browser's address bar and sta... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/oninputcancelled/index.md | ---
title: omnibox.onInputCancelled
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/onInputCancelled
page-type: webextension-api-event
browser-compat: webextensions.api.omnibox.onInputCancelled
---
{{AddonSidebar}}
Fired when the user has cancelled their interaction with your extension (for example, by clicking outsi... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/oninputentereddisposition/index.md | ---
title: omnibox.OnInputEnteredDisposition
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/OnInputEnteredDisposition
page-type: webextension-api-type
browser-compat: webextensions.api.omnibox.OnInputEnteredDisposition
---
{{AddonSidebar}}
The **`omnibox.OnInputEnteredDisposition`** type describes how the extension ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/oninputchanged/index.md | ---
title: omnibox.onInputChanged
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/onInputChanged
page-type: webextension-api-event
browser-compat: webextensions.api.omnibox.onInputChanged
---
{{AddonSidebar}}
Fired whenever the user changes their input, after they have started interacting with your extension by enter... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/oninputentered/index.md | ---
title: omnibox.onInputEntered
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/onInputEntered
page-type: webextension-api-event
browser-compat: webextensions.api.omnibox.onInputEntered
---
{{AddonSidebar}}
Fired when the user has selected one of the suggestions your extension has added to the address bar's drop-do... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/ondeletesuggestion/index.md | ---
title: omnibox.onDeleteSuggestion
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/onDeleteSuggestion
page-type: webextension-api-event
browser-compat: webextensions.api.omnibox.onDeleteSuggestion
---
{{AddonSidebar}}
Fired whenever the user deletes a suggestion.
A suggestion can be deleted when {{WebExtAPIRef("om... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/oninputstarted/index.md | ---
title: omnibox.onInputStarted
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/onInputStarted
page-type: webextension-api-event
browser-compat: webextensions.api.omnibox.onInputStarted
---
{{AddonSidebar}}
Fired when the user starts interacting with your extension by entering its keyword in the address bar and the... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/suggestresult/index.md | ---
title: omnibox.SuggestResult
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/SuggestResult
page-type: webextension-api-type
browser-compat: webextensions.api.omnibox.SuggestResult
---
{{AddonSidebar}}
The **`omnibox.SuggestResult`** type defines a suggestion that the extension can add to the address bar's drop-do... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/omnibox/setdefaultsuggestion/index.md | ---
title: omnibox.setDefaultSuggestion()
slug: Mozilla/Add-ons/WebExtensions/API/omnibox/setDefaultSuggestion
page-type: webextension-api-function
browser-compat: webextensions.api.omnibox.setDefaultSuggestion
---
{{AddonSidebar}}
Set the default suggestion to appear in the address bar drop-down list when the user s... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/index.md | ---
title: sessions
slug: Mozilla/Add-ons/WebExtensions/API/sessions
page-type: webextension-api
browser-compat: webextensions.api.sessions
---
{{AddonSidebar}}
Use the sessions API to list, and restore, tabs and windows that have been closed while the browser has been running.
The {{WebExtAPIRef("sessions.getRecent... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/settabvalue/index.md | ---
title: sessions.setTabValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/setTabValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.setTabValue
---
{{AddonSidebar}}
Stores a key/value pair to associate with a given tab. You can subsequently retrieve this value using {{WebExt... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/max_session_results/index.md | ---
title: sessions.MAX_SESSION_RESULTS
slug: Mozilla/Add-ons/WebExtensions/API/sessions/MAX_SESSION_RESULTS
page-type: webextension-api-property
browser-compat: webextensions.api.sessions.MAX_SESSION_RESULTS
---
{{AddonSidebar}}
This value represents the maximum number of sessions that will be returned by a call to ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/removewindowvalue/index.md | ---
title: sessions.removeWindowValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/removeWindowValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.removeWindowValue
---
{{AddonSidebar}}
Removes a value previously stored by a call to {{WebExtAPIRef("sessions.setWindowValue")}}.
... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/onchanged/index.md | ---
title: sessions.onChanged
slug: Mozilla/Add-ons/WebExtensions/API/sessions/onChanged
page-type: webextension-api-event
browser-compat: webextensions.api.sessions.onChanged
---
{{AddonSidebar}}
Fired whenever the list of closed tabs or windows changes.
## Syntax
```js-nolint
browser.sessions.onChanged.addListene... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/removetabvalue/index.md | ---
title: sessions.removeTabValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/removeTabValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.removeTabValue
---
{{AddonSidebar}}
Removes a value previously stored by a call to {{WebExtAPIRef("sessions.setTabValue")}}.
This is an ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/session/index.md | ---
title: sessions.Session
slug: Mozilla/Add-ons/WebExtensions/API/sessions/Session
page-type: webextension-api-type
browser-compat: webextensions.api.sessions.Session
---
{{AddonSidebar}}
The `Session` object represents a tab or window that the user has closed in the current browsing session.
Sessions are represen... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/gettabvalue/index.md | ---
title: sessions.getTabValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/getTabValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.getTabValue
---
{{AddonSidebar}}
Retrieves a value previously stored by a call to {{WebExtAPIRef("sessions.setTabValue")}}.
You can retrieve a... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/restore/index.md | ---
title: sessions.restore()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/restore
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.restore
---
{{AddonSidebar}}
Restores a closed tab or window. Restoring doesn't just reopen the tab or window: it also restores the tab's navigation hi... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/forgetclosedtab/index.md | ---
title: sessions.forgetClosedTab()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/forgetClosedTab
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.forgetClosedTab
---
{{AddonSidebar}}
Removes a closed tab from the browser's list of recently closed tabs. Note that the sites visited ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/getrecentlyclosed/index.md | ---
title: sessions.getRecentlyClosed()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/getRecentlyClosed
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.getRecentlyClosed
---
{{AddonSidebar}}
Returns an array of {{WebExtAPIRef("sessions.Session", "Session")}} objects, representing wi... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/forgetclosedwindow/index.md | ---
title: sessions.forgetClosedWindow()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/forgetClosedWindow
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.forgetClosedWindow
---
{{AddonSidebar}}
Removes a closed window from the browser's list of recently closed windows. Note that the... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/getwindowvalue/index.md | ---
title: sessions.getWindowValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/getWindowValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.getWindowValue
---
{{AddonSidebar}}
Retrieves a value previously stored by a call to {{WebExtAPIRef("sessions.setWindowValue")}}.
You ca... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/filter/index.md | ---
title: sessions.Filter
slug: Mozilla/Add-ons/WebExtensions/API/sessions/Filter
page-type: webextension-api-type
browser-compat: webextensions.api.sessions.Filter
---
{{AddonSidebar}}
The `Filter` object enables you to restrict the number of {{WebExtAPIRef("sessions.Session", "Session")}} objects returned by a cal... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/sessions/setwindowvalue/index.md | ---
title: sessions.setWindowValue()
slug: Mozilla/Add-ons/WebExtensions/API/sessions/setWindowValue
page-type: webextension-api-function
browser-compat: webextensions.api.sessions.setWindowValue
---
{{AddonSidebar}}
Stores a key/value pair to associate with a given window. You can subsequently retrieve this value us... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/index.md | ---
title: windows
slug: Mozilla/Add-ons/WebExtensions/API/windows
page-type: webextension-api
browser-compat: webextensions.api.windows
---
{{AddonSidebar}}
Interact with browser windows. You can use this API to get information about open windows and to open, modify, and close windows. You can also listen for window... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/windowtype/index.md | ---
title: windows.WindowType
slug: Mozilla/Add-ons/WebExtensions/API/windows/WindowType
page-type: webextension-api-type
browser-compat: webextensions.api.windows.WindowType
---
{{AddonSidebar}}
The type of browser window this is.
## Type
Values of this type are `strings`. Possible values are:
- `"normal"`
- `"po... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/windowstate/index.md | ---
title: windows.WindowState
slug: Mozilla/Add-ons/WebExtensions/API/windows/WindowState
page-type: webextension-api-type
browser-compat: webextensions.api.windows.WindowState
---
{{AddonSidebar}}
The state of this browser window.
## Type
Values of this type are `strings`. Possible values are:
- `"normal"`
- :... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/remove/index.md | ---
title: windows.remove()
slug: Mozilla/Add-ons/WebExtensions/API/windows/remove
page-type: webextension-api-function
browser-compat: webextensions.api.windows.remove
---
{{AddonSidebar}}
Closes a window and all the tabs inside it, given the window's ID.
This is an asynchronous function that returns a [`Promise`](... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/get/index.md | ---
title: windows.get()
slug: Mozilla/Add-ons/WebExtensions/API/windows/get
page-type: webextension-api-function
browser-compat: webextensions.api.windows.get
---
{{AddonSidebar}}
Gets details about a window, given its ID. The details are passed into a callback.
This is an asynchronous function that returns a [`Pro... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/create/index.md | ---
title: windows.create()
slug: Mozilla/Add-ons/WebExtensions/API/windows/create
page-type: webextension-api-function
browser-compat: webextensions.api.windows.create
---
{{AddonSidebar}}
Creates a new window.
When you create the window, you can:
- Load one or more new tabs into the window.
- Move a tab from an e... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/window_id_current/index.md | ---
title: windows.WINDOW_ID_CURRENT
slug: Mozilla/Add-ons/WebExtensions/API/windows/WINDOW_ID_CURRENT
page-type: webextension-api-property
browser-compat: webextensions.api.windows.WINDOW_ID_CURRENT
---
{{AddonSidebar}}
`browser.windows.WINDOW_ID_CURRENT` is a value that can be used as a `windowId` parameter in some... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/window_id_none/index.md | ---
title: windows.WINDOW_ID_NONE
slug: Mozilla/Add-ons/WebExtensions/API/windows/WINDOW_ID_NONE
page-type: webextension-api-property
browser-compat: webextensions.api.windows.WINDOW_ID_NONE
---
{{AddonSidebar}}
The `windowId` value that represents the absence of a browser window.
## Browser compatibility
{{Compat}... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/getlastfocused/index.md | ---
title: windows.getLastFocused()
slug: Mozilla/Add-ons/WebExtensions/API/windows/getLastFocused
page-type: webextension-api-function
browser-compat: webextensions.api.windows.getLastFocused
---
{{AddonSidebar}}
Gets the window that was most recently focused — typically the window 'on top'.
This is an asynchronous... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/oncreated/index.md | ---
title: windows.onCreated
slug: Mozilla/Add-ons/WebExtensions/API/windows/onCreated
page-type: webextension-api-event
browser-compat: webextensions.api.windows.onCreated
---
{{AddonSidebar}}
Fired when a window is created.
## Syntax
```js-nolint
browser.windows.onCreated.addListener(listener)
browser.windows.onC... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/update/index.md | ---
title: windows.update()
slug: Mozilla/Add-ons/WebExtensions/API/windows/update
page-type: webextension-api-function
browser-compat: webextensions.api.windows.update
---
{{AddonSidebar}}
Updates the properties of a window. Use this to move, resize, and (un)focus a window, etc.
This is an asynchronous function tha... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/getcurrent/index.md | ---
title: windows.getCurrent()
slug: Mozilla/Add-ons/WebExtensions/API/windows/getCurrent
page-type: webextension-api-function
browser-compat: webextensions.api.windows.getCurrent
---
{{AddonSidebar}}
Gets the current browser window, passing its details into a callback.
The "current" window is not necessarily the s... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/createtype/index.md | ---
title: windows.CreateType
slug: Mozilla/Add-ons/WebExtensions/API/windows/CreateType
page-type: webextension-api-type
browser-compat: webextensions.api.windows.CreateType
---
{{AddonSidebar}}
Specifies the type of browser window to create.
## Type
Values of this type are `strings`. Possible values are:
- `"nor... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/getall/index.md | ---
title: windows.getAll()
slug: Mozilla/Add-ons/WebExtensions/API/windows/getAll
page-type: webextension-api-function
browser-compat: webextensions.api.windows.getAll
---
{{AddonSidebar}}
Gets information about all open windows, passing them into a callback.
This is an asynchronous function that returns a [`Promis... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/onremoved/index.md | ---
title: windows.onRemoved
slug: Mozilla/Add-ons/WebExtensions/API/windows/onRemoved
page-type: webextension-api-event
browser-compat: webextensions.api.windows.onRemoved
---
{{AddonSidebar}}
Fired when a window is closed.
## Syntax
```js-nolint
browser.windows.onRemoved.addListener(listener)
browser.windows.onRe... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/window/index.md | ---
title: windows.Window
slug: Mozilla/Add-ons/WebExtensions/API/windows/Window
page-type: webextension-api-type
browser-compat: webextensions.api.windows.Window
---
{{AddonSidebar}}
Information about a browser window.
## Type
Values of this type are `objects`. They contain the following properties:
- `alwaysOnTo... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/windows/onfocuschanged/index.md | ---
title: windows.onFocusChanged
slug: Mozilla/Add-ons/WebExtensions/API/windows/onFocusChanged
page-type: webextension-api-event
browser-compat: webextensions.api.windows.onFocusChanged
---
{{AddonSidebar}}
Fired when the currently focused window changes. Will be {{WebExtAPIRef('windows.WINDOW_ID_NONE')}} if all br... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/index.md | ---
title: cookies
slug: Mozilla/Add-ons/WebExtensions/API/cookies
page-type: webextension-api
browser-compat: webextensions.api.cookies
---
{{AddonSidebar}}
Enables extensions to get and set cookies, and be notified when they change.
## Permissions
To use this API, an add-on must specify the "cookies" [API permiss... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/remove/index.md | ---
title: cookies.remove()
slug: Mozilla/Add-ons/WebExtensions/API/cookies/remove
page-type: webextension-api-function
browser-compat: webextensions.api.cookies.remove
---
{{AddonSidebar}}
The **`remove()`** method of the {{WebExtAPIRef("cookies")}} API deletes a cookie, given its name and URL.
The call succeeds on... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/onchanged/index.md | ---
title: cookies.onChanged
slug: Mozilla/Add-ons/WebExtensions/API/cookies/onChanged
page-type: webextension-api-event
browser-compat: webextensions.api.cookies.onChanged
---
{{AddonSidebar}}
The `onChanged` event of the {{WebExtAPIRef("cookies")}} API fires when a cookie that the extension can access is set or rem... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/get/index.md | ---
title: cookies.get()
slug: Mozilla/Add-ons/WebExtensions/API/cookies/get
page-type: webextension-api-function
browser-compat: webextensions.api.cookies.get
---
{{AddonSidebar}}
The **`get()`** method of the {{WebExtAPIRef("cookies")}} API retrieves information about a single cookie, given its name and URL.
If mo... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/set/index.md | ---
title: cookies.set()
slug: Mozilla/Add-ons/WebExtensions/API/cookies/set
page-type: webextension-api-function
browser-compat: webextensions.api.cookies.set
---
{{AddonSidebar}}
The **`set()`** method of the {{WebExtAPIRef("cookies")}} API sets a cookie containing the specified cookie data. This method is equivale... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/cookie/index.md | ---
title: cookies.Cookie
slug: Mozilla/Add-ons/WebExtensions/API/cookies/Cookie
page-type: webextension-api-type
browser-compat: webextensions.api.cookies.Cookie
---
{{AddonSidebar}}
The `Cookie` type of the {{WebExtAPIRef("cookies")}} API represents information about an HTTP cookie.
## Type
Values of this type ar... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/onchangedcause/index.md | ---
title: cookies.OnChangedCause
slug: Mozilla/Add-ons/WebExtensions/API/cookies/OnChangedCause
page-type: webextension-api-type
browser-compat: webextensions.api.cookies.OnChangedCause
---
{{AddonSidebar}}
The `OnChangedCause` type of the {{WebExtAPIRef("cookies")}} API represents the reason a cookie changed.
## T... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/cookiestore/index.md | ---
title: cookies.CookieStore
slug: Mozilla/Add-ons/WebExtensions/API/cookies/CookieStore
page-type: webextension-api-type
browser-compat: webextensions.api.cookies.CookieStore
---
{{AddonSidebar}}
The `CookieStore` type of the {{WebExtAPIRef("cookies")}} API represents a cookie store in the browser.
Windows in dif... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/getallcookiestores/index.md | ---
title: cookies.getAllCookieStores()
slug: Mozilla/Add-ons/WebExtensions/API/cookies/getAllCookieStores
page-type: webextension-api-function
browser-compat: webextensions.api.cookies.getAllCookieStores
---
{{AddonSidebar}}
The **`getAllCookieStores()`** method of the {{WebExtAPIRef("cookies")}} API returns a list ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/samesitestatus/index.md | ---
title: cookies.SameSiteStatus
slug: Mozilla/Add-ons/WebExtensions/API/cookies/SameSiteStatus
page-type: webextension-api-type
browser-compat: webextensions.api.cookies.SameSiteStatus
---
{{AddonSidebar}}
The `SameSiteStatus` type of the {{WebExtAPIRef("cookies")}} API represents information about the `SameSite` s... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/cookies/getall/index.md | ---
title: cookies.getAll()
slug: Mozilla/Add-ons/WebExtensions/API/cookies/getAll
page-type: webextension-api-function
browser-compat: webextensions.api.cookies.getAll
---
{{AddonSidebar}}
The **`getAll()`** method of the {{WebExtAPIRef("cookies")}} API retrieves all cookies from a single cookie store that match the... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/dom/index.md | ---
title: dom
slug: Mozilla/Add-ons/WebExtensions/API/dom
page-type: webextension-api
browser-compat: webextensions.api.dom
---
{{AddonSidebar}}
Access special extension only DOM features.
## Functions
- {{WebExtAPIRef("dom.openOrClosedShadowRoot()")}}
- : Gets the open shadow root or the closed shadow root host... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/dom | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/dom/openorclosedshadowroot/index.md | ---
title: dom.openOrClosedShadowRoot()
slug: Mozilla/Add-ons/WebExtensions/API/dom/openOrClosedShadowRoot
page-type: webextension-api-function
browser-compat: webextensions.api.dom.openOrClosedShadowRoot
---
{{AddonSidebar}}
Gets the open shadow root or the closed shadow root hosted by the specified element. If the ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/index.md | ---
title: proxy
slug: Mozilla/Add-ons/WebExtensions/API/proxy
page-type: webextension-api
browser-compat: webextensions.api.proxy
---
{{AddonSidebar}}
Use the proxy API to proxy web requests. You can use the {{WebExtAPIRef("proxy.onRequest")}} event listener to intercept web requests, and return an object that descr... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/proxyinfo/index.md | ---
title: proxy.ProxyInfo
slug: Mozilla/Add-ons/WebExtensions/API/proxy/ProxyInfo
page-type: webextension-api-type
browser-compat: webextensions.api.proxy.ProxyInfo
---
{{AddonSidebar}}
Contains information about a proxy. This object, or an array of these objects, is returned from the listener to {{WebExtAPIRef("pro... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/settings/index.md | ---
title: proxy.settings
slug: Mozilla/Add-ons/WebExtensions/API/proxy/settings
page-type: webextension-api-property
browser-compat: webextensions.api.proxy.settings
---
{{AddonSidebar}}
A {{WebExtAPIRef("types.BrowserSetting", "BrowserSetting")}} object that can be used to change the browser's proxy settings.
> **... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/onrequest/index.md | ---
title: proxy.onRequest
slug: Mozilla/Add-ons/WebExtensions/API/proxy/onRequest
page-type: webextension-api-event
browser-compat: webextensions.api.proxy.onRequest
---
{{AddonSidebar}}
Fired when a web request is about to be made, to give the extension an opportunity to proxy it.
This event is closely modeled on ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/requestdetails/index.md | ---
title: proxy.RequestDetails
slug: Mozilla/Add-ons/WebExtensions/API/proxy/RequestDetails
page-type: webextension-api-type
browser-compat: webextensions.api.proxy.RequestDetails
---
{{AddonSidebar}}
Contains information about a web request. An instance of this object is passed into the {{WebExtAPIRef("proxy.onRequ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/proxy/onerror/index.md | ---
title: proxy.onError
slug: Mozilla/Add-ons/WebExtensions/API/proxy/onError
page-type: webextension-api-event
browser-compat: webextensions.api.proxy.onError
---
{{AddonSidebar}}
Fired when there is an error evaluating the PAC file or the `onRequest` listener.
The error can be triggered by throwing or returning a... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/clipboard/index.md | ---
title: clipboard
slug: Mozilla/Add-ons/WebExtensions/API/clipboard
page-type: webextension-api
browser-compat: webextensions.api.clipboard
---
{{AddonSidebar}}
The WebExtension `clipboard` API (which is different from the [standard Clipboard API](/en-US/docs/Web/API/Clipboard_API)) enables an extension to copy it... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/clipboard | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/clipboard/setimagedata/index.md | ---
title: clipboard.setImageData()
slug: Mozilla/Add-ons/WebExtensions/API/clipboard/setImageData
page-type: webextension-api-function
browser-compat: webextensions.api.clipboard.setImageData
---
{{AddonSidebar}}
Copies an image to the clipboard. The image is re-encoded before it is written to the clipboard. If the ... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/privacy/index.md | ---
title: privacy
slug: Mozilla/Add-ons/WebExtensions/API/privacy
page-type: webextension-api
browser-compat: webextensions.api.privacy
---
{{AddonSidebar}}
Access and modify various privacy-related browser settings.
To use the privacy API, you must have the "privacy" [API permission](/en-US/docs/Mozilla/Add-ons/We... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/privacy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/privacy/network/index.md | ---
title: privacy.network
slug: Mozilla/Add-ons/WebExtensions/API/privacy/network
page-type: webextension-api-property
browser-compat: webextensions.api.privacy.network
---
{{AddonSidebar}}
The {{WebExtAPIRef("privacy.network")}} property contains privacy-related network settings. Each property is a {{WebExtAPIRef("... | 0 |
data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/privacy | data/mdn-content/files/en-us/mozilla/add-ons/webextensions/api/privacy/services/index.md | ---
title: privacy.services
slug: Mozilla/Add-ons/WebExtensions/API/privacy/services
page-type: webextension-api-property
browser-compat: webextensions.api.privacy.services
---
{{AddonSidebar}}
The {{WebExtAPIRef("privacy.services")}} property contains privacy-related settings controlling services offered by the brow... | 0 |
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