Modules listed on this page implement high-level APIs for building add-ons: creating user interfaces, interacting with the web, and interacting with the browser.
Unless the documentation explicitly says otherwise, all these modules are "Stable": we'll avoid making incompatible changes to them.
- addon-page
- Create a page that does not contain navigational elements.
- base64
- Data encoding and decoding using Base64 algorithms.
- clipboard
- Interact with the system clipboard, setting and getting its contents.
- context-menu
- Adds items, submenus, and menu separators to the page's context menu.
- hotkeys
- Assign hotkey combinations to functions in your add-on.
- indexed-db
- Exposes the IndexedDB API to add-ons.
- l10n
- Localize strings appearing in the add-on's JavaScript code.
- notifications
- Display transient, toaster-style desktop messages to the user.
- page-mod
- Run scripts in the context of web pages whose URL matches a given pattern.
- page-worker
- Create a permanent, invisible page and access its DOM.
- panel
- Creates transient dialogs to implement part of an add-on's user interface.
- passwords
- Interact with Firefox's Password Manager to add, retrieve and remove stored credentials.
- private-browsing
- Check whether a given object is private, so an add-on can respect private browsing
- querystring
- Utility functions for working with query strings.
- request
- Make simple network requests.
- selection
- Get and set text and HTML selections in the current web page.
- self
- Access data that is bundled with the add-on, and add-on metadata.
- simple-prefs
- Store preferences across application restarts.
- simple-storage
- Lets an add-on store data so that it's retained across Firefox restarts.
- system
- Query the add-on's environment and access arguments passed to it.
- tabs
- Open, manipulate, and access tabs, and receive tab events.
- timers
- Set one-off and periodic timers.
- ui
- Provides access to button, toolbar, and sidebar UI objects.
- url
- Construct, validate, and parse URLs.
- widget
- Create a simple user interface for an add-on in Firefox's add-on bar.
- windows
- Enumerate and examine open browser windows, open new windows, and listen for window events.