I have two complaints about Firefox Focus on iOS:
First, when typing into the address bar, you must finish and tap “search” or “go” or else all you typed will go away if you switch to another app and back again. Firefox Focus shouldn’t forget what you’re doing unless you hit the garbage can icon or force close the app.
Second, if you’re typing, and you tap anywhere I’ve marked in red in the screenshot, it erases the search/url text you’ve typed, and you have to start over. It didn’t used to do this when Firefox Focus first came out. It would be fine to put a garbage can icon somewhere in that area, but the area now that deletes what you’re typing is bigger than the keyboard, and I’ve mis-tapped there way too many times.
I use pretty much every platform each week. It’s not enough of a problem to avoid the whole platform. These two problems are things Mozilla needs to fix.
Note that this is likely still a Safari Frontend. They are now able to integrate their own engine.
This may allow an actual tor browser for example.
But will introduce a looot of work. These apps are currently just different Safari UIs.