http://bt.staszic.waw.pl/?layout=mobi&theme=AJ#tile=mobi I'm having strange rendering issues on my website. HTML&CSS is rather correct especially it is working properly in stable Firefox mobile as well as in all other browsers. The problem is that top bar disappears and is rendered only when viewport is dragged down but events are still handled like on correctly rendered page. This issue appears only in beta. My device is Samsung Galaxy S3. To reproduce issue: open website when page will load wooden top bar is not visible but it can be swiped/dragged down. after typing "test" in quicksearch input (on not rendered input in top right corner) some songs will appear on playlist (this dragged down wooden container) - after clicking on one of entries event will be send to element over touched place (like it'd be clicked on properly rendered interface) proper version (with wooden top bar) comes from stable firefox, without - from beta https://db.tt/pMI2j8r8 https://db.tt/FUvhAgPy i know it's rather bug for Bugzilla but i wasn't able to specify it precisely enough for bugzilla standards (i find debugging on firefox mobile quite annoying), also website is unfinished so it may be strange example but it definitely looks like rendering bug especially that events are handled 'properly' if it's it's not any known issue / too difficult to track using this website - please at least reply what's difference between beta and stable which could cause rendering bugs like that as now i don't even know where to look for source of issue and rendering issues like this seems to be quite serious problem.