Firefox 50.0.2 64-bit ~ Video Problem

User Help for Mozilla Firefox

User avatar
Posts: 52265
Joined: July 18th, 2005, 3:25 am

Post Posted January 25th, 2017, 9:24 am

This is likely a problem with failing MP4 support in the Windows OS.
With 'media.mp4.enabled' set to 'true' the website will try to use the HTML5 media player and fails for some reason.
With 'media.mp4.enabled' set to 'false' the website may try to fallback to the Shockwave Flash plugin and apparently this works in your case.

Media Feature Pack for N editions of Windows 10 Version 1607: ... rsion-1607

Posts: 22
Joined: October 25th, 2011, 7:59 am

Post Posted January 26th, 2017, 3:29 am

'media.mp4.enabled' set to 'false' plays the video: ... ko-deltio/

However, the above change creates problems with some Facebook videos.

What a mess, indeed.


User avatar
Posts: 1153
Joined: September 12th, 2007, 2:30 am
Location: Oklahoma City, OK

Post Posted March 19th, 2017, 2:50 pm

I found this thread after I noticed that Firefox 64bit didn't want play streams at which do use the Flash player. Works fine in Firefox 32bit. FF 52.0.1 and Flash I'm using Windows 7 Pro 64bit. I'll do more diagnosing after the race is over.

Return to Firefox Support

Who is online

Users browsing this forum: No registered users and 9 guests