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Mozilla is working on a new mobile web browser for Android called Firefox Fenix currently; that is the main reason why development for Firefox for Android slowed down in recent months.

Fenix is based on Android Components and GeckoView, and in active development at the time of writing. While it is likely that Firefox Fenix will replace Firefox for Android eventually, nothing appears to have been set in stone yet.

Note: The following information is based on mockups and development versions of Firefox Fenix. Functionality may change during development.