Im building a new webpage with video background. The problem is that Firefox is the only browser that have problem with html5 autoplaying. If page was loaded atleast one time the video is working correclty, starts right after the page load automatically but.. if page is loaded for the first time in most cases the video in background doesn't start and show something like TV's snow. Facts: - I don't think its code issue, atleast not 'video' tag (tried many configurations thinking it might ), - I'm also sure its not problem with video - tried few videos, - tried all formats - it happens with all of them: mp4, wemb, ogg, All at the same time and individually, - it's not problem with my PC - been trying on windows, mac and linux, - Its not plugin - i don't use any with FF. Check it out here: http://strona5.nanit.webd.pl Just do it in private session and close window after every load so you'll see that its lottery. Regards.