https://support.mozilla.org/en-US/kb/fix-problems-images-not-show

https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

https://support.mozilla.org/en-US/kb/html5-audio-and-video-firefox

https://support.mozilla.org/en-US/kb/troubleshoot-issues-with-plugins-fix-problems

https://support.mozilla.org/en-US/kb/warning-unresponsive-plugin

Hi Fred,

Thanks for the response. I managed to resolve the mobile issue.

However the video playback issues I'm having on desktop (MacBook Pro) are persisting.

I tried all the troubleshooting tips in the 'Fix common audio and video issues' guide (https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues) you sent, as well as disabling all each plugin individually and then all together, but none of the solutions have worked.

Basically, I cannot play videos from Facebook, or videos from websites that use the Model video player (screenshots attached).

For the Model issue I have seen this discussed briefly here (https://support.mozilla.org/en-US/questions/1326294), but no solutions are offered, and it seems to be a discussion about Windows issues.

Do you have any solutions for these issues?

Thanks, Will

MEDIA_ERR_SRC_NOT_SUPPORTED

The issue is not due to Firefox but due to the N and KN Editions of Windows not coming with the appropriate Media Feature Pack from Microsoft.

See https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows

https://stackoverflow.com/questions/29822573/html-video-returns-media-err-src-not-supported-error-after-playing-for-a-while and https://www.bing.com/search?q=MEDIA_ERR_SRC_NOT_SUPPORTED

Thanks Fred.

As I mentioned I am having this issue on Mac, not on Windows.

It is unclear to me from those links how to solve it. It's also unclear to me how to solve the playback issues in Facebook.

Do you know of any other solutions?

Thanks, Will

https://www.bing.com/search?q=mac+MEDIA_ERR_SRC_NOT_SUPPORTED

I've Googled this also – not sure where the solution is?

Is there more info in the Web Console ?

You can check the Web Console (Tools -> Web Developer) for messages about blocked content.

• https://developer.mozilla.org/en-US/docs/Tools/Web_Console

You can check the Network Monitor to see if content is blocked or otherwise fails to load.

• https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor

If necessary use "Ctrl+F5" or "Ctrl+Shift+R" (Mac: Command+Shift+R) to reload the page and bypass the cache to generate a fresh log.

Getting these errors. Still completely unclear to me how to resolve it.