Upcoming changes for themes
Theming capabilities on addons.mozilla.org (AMO) will undergo significant changes in the coming weeks. We will be switching to a new theme technology that will give designers more flexibility to create … Read more
New Site for Thunderbird and SeaMonkey Add-ons
When Firefox Quantum (version 57) launched in November 2017, it exclusively supported add-ons built using WebExtensions APIs. addons.mozilla.org (AMO) has followed a parallel development path to Firefox and will soon … Read more
Extensions in Firefox 62
Last week Firefox 62 moved into the Beta channel. This version has fewer additions and changes to the WebExtensions API than the last several releases. Part of that is due … Read more
July’s Featured Extensions
Pick of the Month: Midnight Lizard by Pavel Agarkov More than just dark mode, Midnight Lizard lets you customize the readability of the web in granular detail—adjust everything from color … Read more
Larger image support on addons.mozilla.org
Last week, we pushed an update that enables add-on developers to use larger image sizes on their add-on listings. We hadn’t updated our size limits for many years, so the … Read more
Add-ons at the San Francisco All Hands Meeting
Last week, more than 1,200 Mozillians from around the globe converged on San Francisco, California, for Mozilla’s biannual All Hands meeting to celebrate recent successes, learn more about products from … Read more
June’s Featured Extensions
Pick of the Month: Tabliss by tabliss.io Enjoy a gorgeous new tab page with customizable background images and many informational widgets to choose from, like local weather, date/time, bookmarks, and … Read more
Extensions in Firefox 61
Firefox 60 is now in the Release channel, which means that Firefox 61 has moved from Nightly to the Beta channel. As usual, Mozilla engineers and volunteer contributors have been … Read more
Switching to JSON for update manifests
We plan on switching completely to JSON update manifests on Firefox and AMO. If you self-distribute your add-on please read ahead for details. AMO handles automatic updates for all add-ons … Read more