This code is not in any build yet, so we’ll land it today and get a new build out.
There are two issues left with this version though:
1) So we automatically shrink the text to fit. But there is a limit to the font size and when we hit that, iOS will just break the word randomly. I think currently that only happens for Dutch (Desktopversie), Norwegian (skrivebordversjon) and Swedish (datorwebbplats) (Is that double b supposed to be there?). My advice is to use other terminology there. Shorter or break it up in multiple words. You can also look at Safari, which has a similar option with similar space constraints.
2) Some menu titles need 4 lines. For example Russian and Romanian. It doesn’t look too bad, but limiting it to 3 lines would be better.
Thanks for all the thanks, but I only pushed the button to make the screenshots. Emily did all the experimentation with the layout and made the code changes. You can follow that work in bug https://bugzilla.mozilla.org/show_bug.cgi?id=1282748 and the attached PR :-)
Final note: we are nearing the deadline, but we are happy to do another release rapidly after 5.0, with just L10N fixes. Apple’s turnaround time is now super fast, so within a day or two we could have more fixes on the store and in people’s hands.