On my phone Firefox is terrible. It closes the app when I try to watch video full screen. When I reopen Firefox after the video crash all but 1/4 of the screen is black, and it doesn't respond to clicks on the tabs button to close or open new tabs.

So if it's a YouTube video, I try to view it in the YouTube app. Firefox will open YouTube to the home page but leaves me to find the video again within the YouTube app.

Click the navigate with GPS button inside the browser, and it opens Google maps to the last destination instead of the address you were looking at in Firefox. That made me late to 2 appointments before I figured out what was happening.

The auto fill is terrible or non-existent. The password management feature got stuck in a loop the other day and I had to force close.

Fuck Firefox. Maybe it's better on a new phone, but my experience with Firefox has been absolutely dog shit.