On my Xiaomi 13, when I exit Firefox and go to any other app for more than 5 seconds, Firefox completely forgets any data information then resends it when I reload. Meaning, if a website sends me a code per email, if I exit Firefox to check my email, the page is unloaded and gets reloaded on entry. Which makes it impossible to verify since it keeps restarting. No other browser experiences this behavior. On top of that, I didn't have this issue on a different old phone.