Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

Flash problem


I'm using Firefox 14 & I noticed that I just downloaded a new Flash update. Since then, FF isn't displaying any videos or Flash on different websites.

Anyone have any suggestions how to fix this? SHould I uninstall Flash & reinstall?

Chosen solution

Additional System Details

This happened

Every time Firefox opened

This started when...

I downloaded a new version of Flash


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0

More Information

  • Top 10 Contributor
2380 solutions 21066 answers

Chosen Solution

Check out this article: Flash 11.3 doesn't load video in Firefox. Does it help?

Question owner

I've uninstalled the Flash version I had on my PC & gone to the Flash site & downloaded the latest version the company has available. Videos are now running. So I'm guessing the particular Flash download I installed earlier was buggy.

juhnar 0 solutions 2 answers

Flash player problem seems to be only with bit older AMD (dual core) processors without L3. Not with Intel coro2duo or AMD Phenom.

I solved problem by running flash palyer uninstall and installing flash 10.3 for both firefox and explorer. Then I tapped from control panel -> flash: do not upgrade.

Can this be Microsoft - Intel slowing both AMD processors and Firefox?

SuperRuss 0 solutions 3 answers

Flash video and audio are not in sync. The video refresh is slow in full screen or not. It doesn’t happen on all web sites. Web sites using JW player seem to be most susceptible to these playback problems.

I have the similar problems on two different PCs. My 3rd PC is a little Netbook with XP SP3 and has NEVER been updated and works just fine. It is running Flash

My Dell XP laptop was running the latest Flash. It is a bit old, but has never had a video issue.

My Win7 Ultimate (I5, 3.2 Ghz, 8gig ram) was running the latest Flash and was having the very same issues.

The two PCs above are running FF 14.0.1.

I tried the many resolutions to this problem discussed here and none worked.

I cannot and don’t use IE, because I have to install the latest Flash for it to work.

I was successful by going back to Flash like on my little Netbook. I had to use Torrent to get the old Flash, because Adobe doesn’t provide/support it anymore.

The older Flash instantly corrected the Win7 PC and the XP laptop – for a while. The Win7 PC is still running fine, but the XP laptop has reverted back to slow video performance.

I’ve run virus scans with no issues.

I suspect this growing and common problem is related directly to FF 14.

Any new ideas?

  • Top 10 Contributor
2380 solutions 21066 answers

Helpful Reply

FYI, SuperRuss posted an update in this thread: https://support.mozilla.org/en-US/questions/932815#answer-359896