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Favorite Add-on Tools

  • Add-on Builder

    Use Add-on Builder to quickly and easily develop an extension for Firefox using common web technologies.

  • Add-on Packager

    Auto-generate add-on packaging by entering basic info and picking UI parts. Get working without setup.

  • Add-on Validator

    Check your add-on for common problems and errors. Open to anyone, not just add-ons hosted here.

  • All add-on development tools

Recent Add-ons News & Updates

  • Add-on Compatibility for Firefox 16

    Firefox 16 will be released next week. Here’s the list of changes that went into Firefox 16 that can affect add-on compatibility. There is more information available in Firefox 16 for Developers, so you should read that too. General Mass CSS unprefixing. A very large number of CSS properties are ...

    Posted by Jorge Villalobos

  • Jetpack Project: weekly update for October 02, 2012

    Project News Erik blogged about his excellent work on porting the SDK’s windows and tabs modules to Mobile Firefox! Not to be outdone, Will also blogged about our recently retro-fitted module lifecycle process and policies. Will has also just kicked off a lively thread over in the Jetpack Google Group ...

    Posted by Jeff Griffiths

  • A lifecycle for the Add-on SDK’s APIs

    Until now we’ve not had a very well-defined lifecycle for APIs in the Add-on SDK. We’ve said, broadly, that APIs in the addon-kit package are “supported”, meaning we won’t change them “unless absolutely necessary”, while APIs in the lower-level api-utils package are “not fully stabilized”, meaning that we expect to ...

    Posted by wbamberg

  • Add-ons Update – Week of 2012/09/26

    I post these updates every 3 weeks to inform add-on developers about the status of the review queues, add-on compatibility, and other happenings in the add-ons world. The Review Queues Most nominations for full review are taking less than 2 weeks to review. Most updates are being reviewed within 10 ...

    Posted by Jorge Villalobos

  • Jetpack Project: weekly update for September 25, 2012

    Project News You may have seen a post from Alex Keybl yesterday on changes to Firefox’s release schedule coming up at the end of the year: We’re going to extend the 11/19/2012 – 12/31/2012 cycle by a week, with a revised end of 1/6/2013. Given the timeline change, we’re targeting ...

    Posted by Jeff Griffiths

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