This angered users who used about:config to make configuration changes. Mozilla did introduce full add-ons support in Nightly, a development version of Firefox, but handling was complicated.Īnother feature that Mozilla removed from the stable version of Firefox was support for about:config.

The Stable version offers up to this day no option to install all add-ons that are available. Users who installed other add-ons in Firefox could not get these to run in the Android version anymore. Mozilla picked add-ons from its recommended extensions program, including crowd-favorites such as uBlock Origin. The first was that the new Firefox supported only a limited number of add-ons. While the new Firefox's performance and web compatibility was indeed better, Mozilla made a few design decisions that affected part of the old browser's userbase. It was called Firefox Preview during development and migration from the classic version of Firefox for Android to the new Firefox for Android started in early 2020.

Ublock origin firefox android