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.

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

flash hangs

  • 4 majibu
  • 7 wana tatizo hili
  • 16 views
  • Last reply by Morbus

more options

I'm using Firefox 3.6.3. And i have problems with flash. When i watch flash videos it hangs every fex seconds, somtimes even the sound disappears, and then comes back to normal again. And this happens every ~5 seconds. I can't watch any video content on any webpage. I tried the newest firefox with newest flash. Even tried to fix it with this instructions: http://www.wibbler.com/2009/06/06/flash-player-stuttering-or-hanging-in-firefox/ It's exactly the same problem as written in that webpage, but it didn't worked for me. I can watch flash content only when the firefox is freshly opened, but after ~1 hour it's imposible to watch flash. There's another 2 problems, which i believe is related with flash. The scrolling problem, when i scroll webpage it hangs for some seconds and the comes back to normal again. I believe it's because of the flash on the website. And the last problem is that after several hours of use, Firefox starts to use more than 1 GB of RAM! And then it's imposible to use it anymore. Even though i have 4GBs of RAM. I need to kill the firefox process and then open firefox freshly, to continue browsing webpages.

This happened

Every time Firefox opened

== about a year ago

I'm using Firefox 3.6.3. And i have problems with flash. When i watch flash videos it hangs every fex seconds, somtimes even the sound disappears, and then comes back to normal again. And this happens every ~5 seconds. I can't watch any video content on any webpage. I tried the newest firefox with newest flash. Even tried to fix it with this instructions: http://www.wibbler.com/2009/06/06/flash-player-stuttering-or-hanging-in-firefox/ It's exactly the same problem as written in that webpage, but it didn't worked for me. I can watch flash content only when the firefox is freshly opened, but after ~1 hour it's imposible to watch flash. There's another 2 problems, which i believe is related with flash. The scrolling problem, when i scroll webpage it hangs for some seconds and the comes back to normal again. I believe it's because of the flash on the website. And the last problem is that after several hours of use, Firefox starts to use more than 1 GB of RAM! And then it's imposible to use it anymore. Even though i have 4GBs of RAM. I need to kill the firefox process and then open firefox freshly, to continue browsing webpages. == This happened == Every time Firefox opened == about a year ago

All Replies (4)

more options

Hello. Sorry for the wait.

This kind of issues are, unfortunately, more common and the we'd like. Thankfully, 99% of the cases are very easy to solve. However, you do need to diagnose what your exact problem is. Do this:

  1. run Firefox in safe-mode to disable all extensions and plugins. If this fixes your issues, be them with RAM or CPU usage, then you know it's a problem with plugins or extensions. Proceed to number 2. If safe-mode doesn't fix the issues, then read bellow, after this list;
  2. update all extensions and plugins in your Firefox. If this doesn't solve the issues, proceed to the following number;
  3. disable all extensions and plugins in your Firefox (not running safe-mode). Being certain that, as in safe-mode, the problems you're having have gone away, enable one plugin at a time. You should be certain that you WANT that plugin to be enabled, so keep your overall number of plugins as low as possible. When you encounter the problems, you know you've found a problematic plugin, so disable it for good. Keep enabling all plugins (except problematic ones) until you've gone through them all.
  4. enable one extension at a time. Again, be certain that you WANT that extension to be enabled, so keep your overall number of extensions as low as possible. When you encounter the problems, you know you've found a problematic extension, so disable it for good. Keep enabling all your extensions (except problematic ones) until you've gone through them all;
  5. you're done! You've fixed your problems with problematic add-ons.

Ok, if disabling all extensions and plugins through safe-mode didn't work to bring Firefox's CPU and RAM usage to good levels, then you have different issue. The most likely scenario is that you have a third party software running on your computer that is messing with Firefox. Do as follows:

  1. do a virus/malware check on your computer. If this doesn't fix it, proceed;
  2. disable all software running in the background that you don't want to have running in the background (in windows, this is done by pressing WINDOWS+R in your keyboard, typing "msconfig" (without the commas) and pressing enter. Now, under the "Startup" tab, you can uncheck the software you don't want, and reboot your system for changes to take effect. If you're unsure of what software you want running, ask someone with more experience). If this doesn't fix your issues with Firefox, proceed;
  3. check your firewall/antivirus/security suite for enabled functions/features that you don't want and/or may be conflicting with Firefox. You'll find that these features are most likely tied to Internet Security features, such as link scanners or URL checkers and the like. If you're not sure they are conflicting with Firefox, simply try to disable them to see whether or not that's true. As long as you don't browse the web with your antivirus completely off and your firewall completely turned off, there should be no problems. If this doesn't solve the issues, proceed to the following number;
  4. check your operating system security options, mainly advanced options that are not configured by default. While it's very unlikely that this may be the cause of the problem (after all, it's the last item on the list), it's remotely possible. If this doesn't work, proceed to the following point;
  5. clean up your OS registry, using appropriate software. If this doesn't do it, I'm out of ideas. Except make sure you've followed my instructions correctly.
more options

This can be a problem with session restore. Firefox stores session data every 10 seconds to make it possible to restore a crashed session. If you have (security) software that interferes with that or have many tabs open then that cause cause a delay. Some have reported that increasing the session store saving interval worked for them.

See: http://kb.mozillazine.org/browser.sessionstore.interval http://kb.mozillazine.org/Session_Restore

more options

Ever since Firefox 3.6 came out Flash elements have been locking up the broswer. It happens everyday and it is quite maddening. There is no pattern, just the usage of Flash. I downdated flash to my pre-3.6 Flash version but that did not change anything so I conclude this is a Firefox 3.6 bug. I am not sure what additional pieces of information would be useful here. Again, the only thing that changed was the Firefox version and that made my environment unstable.

more options

It doesn't really matter what changed and what didn't. Plugins are made for the browser, not the other way around, and so plugins have to work well with the browser first and foremost. It's all very easy: if you disable Flash and the problems go away, it's a problem with Flash.

That said, make sure your plugins are all up to date before you contact the people who can help you (Adobe). Alas, "update your plugins" is the first thing they'll tell you.