Add-ons Update – 2016/09

Here’s what’s going on in the add-ons world this month. I’m changing the cadence (down from every 3 weeks) to better align with other work and spend less time writing these.

The Review Queues

In the past month, 1,891 listed add-on submissions were reviewed:

  • 1519 (80%) were reviewed in fewer than 5 days.
  • 132 (7%) were reviewed between 5 and 10 days.
  • 240 (13%) were reviewed after more than 10 days.

There are 159 listed add-ons awaiting review.

You can read about the improvements we’ve made in the review queues here.

If you’re an add-on developer and are looking for contribution opportunities, please consider joining us. Add-on reviewers are critical for our success, and can earn cool gear for their work. Visit our wiki page for more information.

Preliminary Review Removed

As we announced before, we simplified the review process by removing preliminary review, making an add-on review a more straightforward pass/fail decision.

All add-ons on AMO have been migrated to the new system, so add-ons that were preliminarily reviewed before are now fully reviewed, but with the experimental flag on by default. We will send a notification email after we iron out some minor bugs that came up after the migration.


The compatibility blog post for Firefox 50 is up, and the bulk validation will be run in a couple of weeks.

Multiprocess Firefox is now enabled for users without add-ons, and add-ons will be gradually phased in, so make sure you’ve tested your add-on and either use WebExtensions or set the multiprocess compatible flag in your add-on manifest.

As always, we recommend that you test your add-ons on Beta and Firefox Developer Edition to make sure that they continue to work correctly. End users can install the Add-on Compatibility Reporter to identify and report any add-ons that aren’t working anymore.


We would like to thank Atique Ahmed Ziad, Surya Prashanth, weaksauce, zombie, jorgk, and Trishul Goel for their recent contributions to the add-ons world. You can read more about their work in our recognition page.

4 comments on “Add-ons Update – 2016/09”

  1. Ellen Steven wrote on

    Thanks for sharing the useful post and updating us.

  2. Rupali wrote on

    Thanks for the review….its quite helpful

  3. John wrote on

    The 48.0.2 update broke the Theme Font & Size Changer extension. I need this extension to work because when I manage bookmarks with “Show all bookmarks” the type is too small for me to read it unless the extension is working.

    The extension developer has tried three times to update the extension, but it still does not work with the updated Firefox.

    Please update Firefox so that this extension will work.

    1. Jorge Villalobos wrote on

      Make sure that you have the latest version of the extension installed. If you’re still having problems, please use the support information in the add-on page. Compatibility issues are usually fixed in the add-on side, not in Firefox.