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Using the Add-on SDK, you can create Firefox add-ons. You can use various standard Web technologies: JavaScript, HTML, and CSS, to create the add-ons. The SDK includes JavaScript APIs, which you can use to create add-ons and tools for creating, running, testing, and packaging add-ons.


Create user interface components
Create user interface components such as toolbar buttons, context menus, menu items, and dialogs.
Modify web pages
Modify pages matching a URL pattern or dynamically modify a particular tab.
Putting it together
Walkthrough of the Annotator example add-on.


Contributor's guide
Learn how to start contributing to the SDK and about the most important idioms used in the SDK code such as modules, classes and inheritance, private properties, and content processes.
SDK infrastructure
Aspects of the SDK's underlying technology: modules, the Program ID and the rules defining Firefox compatibility.
Content scripts
A detailed guide to working with content scripts.
SDK idioms
The SDK's event framework and the distinction between add-on scripts and content scripts.
XUL migration
A guide to porting XUL add-ons to the SDK. This guide includes a comparison of the two toolsets and a working example of porting a XUL add-on.
Multiprocess Firefox and the SDK
How to check whether your add-on is compatible with multiprocess Firefox or not and fix it accordingly.


High-Level APIs
Reference documentation for the high-level SDK APIs.
Tools reference
Reference documentation for the jpm tool used to develop, test and package add-ons, the console global used for logging, and the package.json file.
Low-Level APIs
Reference documentation for the low-level SDK APIs.


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 Last updated by: rolfedh,