Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Prohledat stránky podpory

Vyhněte se podvodům. Za účelem poskytnutí podpory vás nikdy nežádáme, abyste zavolali nebo poslali SMS na nějaké telefonní číslo nebo abyste sdělili své osobní údaje. Jakékoliv podezřelé chování nám prosím nahlaste pomocí odkazu „Nahlásit zneužití“.

Zjistit více

In Firefox 31.0 a bug makes the browser freeze, and then I can't close tabs anymore, what may solve this?

  • 3 odpovědi
  • 12 má tento problém
  • 56 zobrazení
  • Poslední odpověď od Le_Neko

Good afternoon. With the newest update of Firefox for PC (31.0), I have a problem that occurs almost every time I use the browser.

When trying to close a tab, it sometimes cause the browser to freeze during one minute.

Then a dialog-box appears on the screen. It says that the script "chrome://browser/content/tabbrowser.xml:2004" may be busy.

I can choose between two buttons in this dialog-box.

"Continue" which keeps the script running, in theory; though it just closes the dialog-box, makes the browser freeze again, and then the same dialog-box shows up.

"Stop the script" which ends the freeze; but then I'm unable to close tabs (I can still close the browser).

I also noticed that, when the freeze occurs, the content of the tab I tried to close changes to "New Tab".

When I restart the browser, I am able to close tab again, until the freeze shows up again.

The problem started to appear only when I updated Firefox to the 31.0 version (and I didn't add any browser extension in the meanwhile).

Does anyone have an idea of what I could do to avoid the problem? Thank you very much and have a good day!

Good afternoon. With the newest update of Firefox for PC (31.0), I have a problem that occurs almost every time I use the browser. When trying to close a tab, it sometimes cause the browser to freeze during one minute. Then a dialog-box appears on the screen. It says that the script "chrome://browser/content/tabbrowser.xml:2004" may be busy. I can choose between two buttons in this dialog-box. "Continue" which keeps the script running, in theory; though it just closes the dialog-box, makes the browser freeze again, and then the same dialog-box shows up. "Stop the script" which ends the freeze; but then I'm unable to close tabs (I can still close the browser). I also noticed that, when the freeze occurs, the content of the tab I tried to close changes to "New Tab". When I restart the browser, I am able to close tab again, until the freeze shows up again. The problem started to appear only when I updated Firefox to the 31.0 version (and I didn't add any browser extension in the meanwhile). Does anyone have an idea of what I could do to avoid the problem? Thank you very much and have a good day!

Všechny odpovědi (3)

Hi i have this exact problem, when you updated your firefox to 31.0? i can't find a solution yet, what about you?

Thanks i will notice you if i found something =)

In the immediate future you can try noscript or flashblock addons to block that script.

However upon more research in searching the current Firefox codebase: http://dxr.mozilla.org/mozilla-centra.../search?q=tabbrowser.xml&case=false it seems to be referenced in there, but I do not see a reference to the port associated. The port is usually used for media. I would not know how to start to troubleshoot this, but are there any consistent steps/webpages that cause this to start?

Does this happen in Safe Mode, please see Use Troubleshoot Mode in Firefox? And does it happen in a fresh install?

Good morning Guigs2. I noticed that my problem occurs most frequently when I try to close the homepage of the blogging platform Tumblr.

I tried Chrome for this page, and this problem never occurs with Chrome.

I didn't try Firefox's Safe Mode yet. What is a fresh install? Thank you.