Another fan here. There are some rough spots and there doesn't seem to be much done to fix them. I have already cloned the source but haven't found the time to build it yet.

My main gripe is that it doesn't treat closing the window as "exit", which means you must go to menu and select Exit if you want to remove session cookies and similar.

Another one is that selecting text is clumsy because standard Android lens is not used.

But I still prefer FF to its "all-your-data-are-belong-to-us" competition.

I avoid videos on mobile like the plague anyway (because of shitty data plan), so I can't comment on that, but otherwise I'm a happy user of Firefox for Android, esp. because it has uBlock Origin available.

You may need to add a user-agent spoofing extension. Certain sites will not serve plain H.264 video to Firefox correctly, unless you pretend to be Safari mobile.

I use as my main browser too and I do not have specific problems with it. The greatest advantage is being able to use the same extensions as the desktop version.

It's been good for me! I don't miss Chrome at all. Plus the "send tab to device" is pretty sweet (if not exactly new or original).