Does this occur on any specific websites? By stutter, do you mean the video is loading choppily? Sometimes, this can be due to a bandwidth issue.. have you tried pausing the video for a few minutes then going back to it?

No it stutters during playback. Even if the video is 100% loaded. It happens on any streaming site (YouTube.com, arkvid, vidto.me, gorillavid.in, etc.) VLC 1080p videos in the regular player work fine. I checked Chrome and that also works just fine. No issues in playback. It loads properly Andrew but the playback is choppy and it sometimes loops small fragments over. So after about 2 minutes the audio is obviously desynced from the video.

Hello,

Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.

You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.).

Then perform these steps:

1. Click the menu button and select Options on Windows or Preferences on Mac or Linux.
2. Select the Advanced panel and then the General tab.
3. Uncheck Use hardware acceleration when available.
4. Restart Firefox and see if the problems persist.

Did this fix your problems? Please report back to us!

If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

• Upgrade your graphics drivers to use hardware acceleration and WebGL

If this doesn't help, please see Fix common audio and video issues. Also, you can disable Hardware Acceleration in Adobe Flash if necessary.

Thank you.

I have tried that as well. As I mentioned in my original post, I tried disabling hardware acceleration, running safe mode, and even gone though to disable hardware acceleration specifically for flash. I have updated all drivers. I checked updates on plugins etc as well.

Thanks for your time Andrew. I will go through individual settings per the links you suggested and see how that goes. A quick glossover indicates I have tried most of these after reading other posts with complaints of similar issues but I shall give them all a try once more and see if there's anything I have by chance missed.

Alright after extensive tinkering my hardware acceleration is activated once more but webgl is deactivated. That fixed it.