Back in June, Mozilla announced Firefox Preview, an early version of the new browser for Android that is built on top of Firefox’s own mobile browser engine, GeckoView. We’ve gotten great feedback about the superior performance of GeckoView so far. Not only is it faster than ever, it also opens up many opportunities for building deeper privacy features that we have already started exploring, and a lot of users were wondering what this step meant for add-ons.
We’re happy to confirm that GeckoView is currently building support for extensions through the WebExtensions API. This feature will be available in Firefox Preview, and we are looking forward to offering a great experience for both mobile users and developers.
Bringing GeckoView and Firefox Preview up to par with the APIs that were supported previously in Firefox for Android won’t happen overnight. For the remainder of 2019 and leading into 2020, we are focusing on building support for a selection of content from our Recommended Extensions program that work well on mobile and cover a variety of utilities and features.
At the moment, Firefox Preview does not yet officially support extensions. While some members of the community have discovered that some extensions inadvertently work in Firefox Preview, we do not recommend attempting to install them until they are officially supported as other issues may arise. We expect to implement support for the initial selection of extensions in the first half of 2020, and will post updates here as we make progress.