I get this really annoying one with private tabs that have been open a while that freeze and nothing can be done except closing the tab. Great browser otherwise.
I've got a weird intermittent issue that sometimes when I change tabs by swiping the address bar, the tab I swipe to will end up being an identical looking page to the tab that I just swiped from. Refreshing the page doesn't fix the issue despite the URL being that of a different page, so to resolve I have to copy the URL, close the bugged tab, and the open a new one to the copied URL.
The most annoying thing for me is that Firefox is reloading the current tab if I switch apps and then back to Firefox. Why is this not saved somehow and needs to reload the whole page?
Interesting. I've never had it crash, be it on my Motorola or my Samsung. I don't think they're potatoes as they're terrible for fries, so maybe that's it.
Have you tried a new profile? It'll clear your extensions and whatnot, but that has fixed a few issues I've had. Or if it's on Android, clear the user data.