This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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 archived. Please ask a new question if you need help.

firefox + flash = terrible lag

  • 6 replies
  • 24 have this problem
  • 12 views
  • Last reply by scottyhd

Th3End
Th3End
more options

It seems, like mozilla support can do nothing with this problem. So let's try again. Many people have terrible lag with firefox on windows, while flash player is installed. There is no ansewr why. Disabling flash protect mode or hardware acceleration do not help. Reinstalling flash plugin also.

I have figured out, that this problem is somehow connected with hibernation. So if you turn off pc and then turn it on (or reboot) everything works fine. But if you use hybernation, firefox starts to awfully slow the whole machine, when you turn it on from hibernation.

Why do this happen?

It seems, like mozilla support can do nothing with this problem. So let's try again. Many people have terrible lag with firefox on windows, while flash player is installed. There is no ansewr why. Disabling flash protect mode or hardware acceleration do not help. Reinstalling flash plugin also. I have figured out, that this problem is somehow connected with hibernation. So if you turn off pc and then turn it on (or reboot) everything works fine. But if you use hybernation, firefox starts to awfully slow the whole machine, when you turn it on from hibernation. Why do this happen?

All Replies (6)

user633449
user633449
more options

Please update to Firefox 32, 19 is no longer supported and is old and buggy. Update Firefox to the latest release

Th3End
Th3End Question owner
more options

Why do you think, I am writing from 19 version? Maybe, because I am forced to use my second PC due my main is lagging like hell at the moment? This is not a solution.

Firefox 32 lags, while this version works fine, because this PC never hibernated.

user633449
user633449
more options

Obviously I don't know this is your second computer (which you should still update BTW).

Hibernation is honestly NOT a good thing to use on your machine. Either let the screen turn off, or turn the thing off, but never use Hibernation.

Th3End
Th3End Question owner
more options

Sorry, I was a bit angry ;D Yes with sleep insted of hibernate it works fine. Also I tried to hibernate on another motherboard and its seems okay also. Strange things happens sometimes.

st4rdog
st4rdog
more options

Youtube videos don't buffer properly and will hang when trying to buffer at certain points, requiring a page refresh.

All BBC iPlayer videos (and BBC website videos) lag/hang for a second when pressing Play/Pause or selecting a volume level. Does not happen in Chrome. Changing hardware accel in Flash does nothing.

http://www.bbc.co.uk/iplayer http://www.bbc.co.uk/sport/0/football/29424233

Firefox 32.0.3 - 15.0.0.152

scottyhd
scottyhd
more options

I had a very similar problem........freezing for agae before playing and doing the same again when you tried to open up to full screen.....Here is what I did to fix it..

....When you go to this link http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues and right click on the Adobe logo in the screen. Instead of going into Settings I went into Global Settings. Then I clicked on the box "local storage settings by site" and in the new box that opened I found "emp bbci co uk" I then clicked on "emp bbci co uk" to highlight it and proceeded to open the box below and changed Allow to Block, closed both the Adobe boxes and bingo, when I went to the BBC News and BBC IPlayer pages I was having problems with my problem was fixed.......No Firefox restart needed.

I hope that helps some folks out..