Fennec is, as I understand it, an older version of Firefox for Android that is no longer supported by Mozilla. I guess it must be more libre or not use Mozilla

Fennec is, as I understand it, an older version of Firefox for Android that is no longer supported by Mozilla. I guess it must be more libre or not use Mozilla branding, as it is available in the F-droid store unlikel the normal version. It's a version of Firefox for Android that does indeed support all add-ons, with the caveat that some interfaces might be difficult to use on mobile.