Updated September 30, 2020
What add-ons are supported on the new Firefox for Android?
Currently, only a limited number of extensions in our Recommended program are supported on the new Firefox for Android (codename: Fenix) release channel. These extensions can be found and installed from the Add-ons Manager. See this article for more information.
Will more add-ons be supported in the future?
We wanted to ensure that the first add-ons supported in the new Firefox for Android provide an exceptional, secure mobile experience to our users. To this end, we have prioritized Recommended Extensions that cover common mobile use cases and that are optimized for different screen sizes. For these reasons, it’s possible that not all the add-ons you have previously installed in Firefox for Android will be supported in the near future.
Will add-ons not part of the Recommended Extensions program ever be supported on the new Firefox for Android?
We would like to expand our support to other add-ons on the release channel, and we are continuously working on increasing support while taking into account usage and feedback to ensure we are making the most of our available resources. We will post updates to this blog as plans solidify each quarter.
Can I install extensions from addons.mozilla.org to Firefox for Android?
Currently, you cannot install extensions directly from addons.mozilla.org to Firefox for Android. In the near term you will need to install extensions from the Add-ons Manager on the new Firefox for Android. However, we are thinking about how to support the installation process from AMO as we evaluate future plans.
Can I install other extensions on a pre-release build of Firefox for Android?
Yes, there is an override in Firefox for Android Nightly that you can use to install extensions listed on addons.mozilla.org (AMO) via AMO’s Collections feature. See this post for instructions. Currently, you cannot install an unlisted extension on Firefox for Android Nightly.
What WebExtensions APIs are currently supported on Firefox for Android?
Most of the WebExtensions APIs supported on the previous Firefox for Android experience are supported in the current application. You can see the current list of compatible APIs on MDN.
Extensions that use unsupported APIs may be buggy or not work at all on Firefox for Android Nightly.
How can I test my extension’s compatibility with Firefox for Android?
You can find more information about developing and testing extensions for Firefox for Android on Firefox Extension Workshop.
What happens to add-ons during the migration from the old Firefox for Android experience to the new one?
Any extensions that are supported on the new Firefox for Android that you had previously installed will be migrated when you upgrade. All other add-ons will be disabled for now.
What is GeckoView?
GeckoView is Mozilla’s mobile browser engine. It takes Gecko, the engine that powers the desktop version of Firefox, and packages it as a reusable Android library. Rebuilding our Firefox for Android browser with GeckoView means we can leverage our Firefox expertise in creating safe and robust online experiences for mobile.