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Firefox 22 displays undefined repeatedly. Also freezes on startup

  • 5 ردود
  • 10 have this problem
  • 2 views
  • آخر ردّ كتبه MattKimura

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Ever since Firefox updated to 22, I've been experiencing problems with Firefox. It was working completely fine until now. There are two issues I have here. 1. Firefox hangs when I open it. Has a slight chance of not hanging sometimes, but the browser would be too slow to use. 2. This problem happens when I go to any website. When I load a page, the word undefined is shown repeatedly across the entire page.

I've tried disabling the following addons, but both issues persist: Noscript, Internet Download Manager, Stylish, Dictionary, quick search

I keep getting hangs when opening the browser, so it's tough to test the other addons. What's strange is that these addons work fine on my brother's desktop computer. My other addons untested: Speedfox, Adblock, WOT, FVD fast dial, quicknote

I'm out of ideas to fix it. Are there any other methods to fixing my browser? Am I able to get a diagnostic list of my browser, that I can post here for assistance?

Ever since Firefox updated to 22, I've been experiencing problems with Firefox. It was working completely fine until now. There are two issues I have here. 1. Firefox hangs when I open it. Has a slight chance of not hanging sometimes, but the browser would be too slow to use. 2. This problem happens when I go to any website. When I load a page, the word undefined is shown repeatedly across the entire page. I've tried disabling the following addons, but both issues persist: Noscript, Internet Download Manager, Stylish, Dictionary, quick search I keep getting hangs when opening the browser, so it's tough to test the other addons. What's strange is that these addons work fine on my brother's desktop computer. My other addons untested: Speedfox, Adblock, WOT, FVD fast dial, quicknote I'm out of ideas to fix it. Are there any other methods to fixing my browser? Am I able to get a diagnostic list of my browser, that I can post here for assistance?

الحل المُختار

Are you aware that Firefox 22 is in beta testing, and won't be released for almost 5 weeks?
Firefox 21 is the current released version.


The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thank you.

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All Replies (5)

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الحل المُختار

Are you aware that Firefox 22 is in beta testing, and won't be released for almost 5 weeks?
Firefox 21 is the current released version.


The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thank you.

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A reset always works well. I had to do a reset not too long ago for another problem. I'm gonna back away from the beta channel, hopefully I'll be problem free then. Thanks for the fast reply, I appreciate it.

Btw the undefined problem persists, after signing into my sync account, must be an addon. I'll install Firefox 21 an start fresh

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This issue can be caused by an extension that isn't working properly.

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 or otherwise make changes.
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Well, I don't have the beta version, but since it upgraded to v. 22, I have the same freezing issue and PriceBlink no longer works. I tried this on 2 different machines, one of which never had Firefox installed before...and with no other add-ons.

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I'd reset if I were you. Especially if you've been using Firefox for a long while, and you messed with a lot of different addons. What I did was uninstall firefox, deleted it in the registry, and re installed the non beta. I had to re install all my addons, but now Firefox is completely refreshed and it works flawless the way it should be. If you need to backup bookmarks, use eversync. Once you reset, it's a good idea not to install addons, just install important ones you know you'll need, an Firefox will be problem free in the future.