The user.js file is only present if you or other software has created this file and normally it wouldn't be there. Your System Details list shows that you have a user.js file in the profile folder to initialize prefs each time Firefox starts. I tried turning off hardware acceleration earlier but that wasn't it either. Flash and Java have been updated to the latest versions.Ĭor-el said Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.Īs I said, safe mode does not solve the problem.
I think Vimeo uses HTML5, but it's the only non-Flash video site I could find that still works.
If I could just figure out which line(s) in the prefs.js file was causing the issue, I would delete/modify it myself in Notepad.įor the record, I already had set to false. It's definitely something Mozilla changed but forgot to alter/remove an old setting that's gumming up the works. It also downloaded the update to Firefox 35 in the background and as soon as I restarted it, the HTML5 videos were broken. I tested it with the Vine website, all videos worked. It was using version 34.0.5 and everything was fine with that version. To be absolutely certain, I turned on my laptop that had the same exact extensions and settings imported to it from this computer with FEBE a while back. I know the problem is with the update to Firefox 35 specifically because everything was working fine before and stopped working after. The problem is solved by using a fresh profile or deleting the prefs.js file, but this is not an option for me, as restoring all my settings from scratch would be a time-consuming hassle I'd rather not deal with. Switching to safe mode does not fix the problem. I do have NoScript, but disabling or removing it does not fix the problem. I updated to Firefox 35 recently and now HTML5 videos will not work.
ANGLE (NVIDIA GeForce GTX 770 Direct3D9Ex vs_3_0 ps_3_0)
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