Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was closed and archived. Əgər kömək lazımdırsa lütfən yeni sual verin.

Firefox 34 Breaks Flash Player

  • 4 cavab
  • 124 have this problem
  • 48 views
  • Last reply by ellenjones6

user1150464
user1150464
more options

I have Flash Player 11.2.202.424 installed and it has been working perfectly. However, upgrading from Firefox 33 to 34 breaks Flash Player. It is still enabled according to about:plugins, but the test page http://www.adobe.com/software/flash/about/ no longer works and YouTube videos are now black boxes. Any help is appreciated. Thank you.

I have Flash Player 11.2.202.424 installed and it has been working perfectly. However, upgrading from Firefox 33 to 34 breaks Flash Player. It is still enabled according to about:plugins, but the test page http://www.adobe.com/software/flash/about/ no longer works and YouTube videos are now black boxes. Any help is appreciated. Thank you.

Chosen solution

Still works for me with Firefox 34.0.5

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.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window

Any luck with disabling OMTC?

You can try to disable OMTC and leave hardware acceleration in Firefox enabled.

  • about:config page: layers.offmainthreadcomposition.enabled = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

Read this answer in context 👍 2

All Replies (4)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Seçilmiş Həll

Still works for me with Firefox 34.0.5

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.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window

Any luck with disabling OMTC?

You can try to disable OMTC and leave hardware acceleration in Firefox enabled.

  • about:config page: layers.offmainthreadcomposition.enabled = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

tagfoto
tagfoto
more options

The only real solution appears to be rolling back to a stable version. At work I had to use a prehistoric version of Sea Monkey today - FF worked until the last "upgrade." Ouch...a patched version would be useful.

Rudolfm
Rudolfm
more options

DO NOT CHANGE the above mentioned layers... in Android! I tried it and then about:config stopped functioning, and all I got was blank screens. I had to edit prefs.js using a filemanager with root rights to get Firefox back to working.

ellenjones6
ellenjones6
more options

My solution is to stop using Firefox until Firefox finds a fix for this problem.