How can I avoid that Mozilla and some extensions to open new tabs everytime that I open firefox, even if no update?

I use Firefox 9.0.1 on a Windows 7 laptop. Since the upgrade to 9.0 and 9.0.1 Mozilla and Speed Dial open new tabs as if they have been updated, although there has been no update. Colorful tabs 8.0 does as well, but I disabled it.

It should not be a user.js file in the Firefox profile folder, unless you other other software or Firefox extension he created.

Can you post the contents of user.js if you have such a file?
You can use this button to go to the Firefox profile folder:

  • Help > troubleshooting information > profile directory: opens showing the file

You can also try to rename prefs.js to prefs.js.old to reset all preferences, in which case there is a problem with the file as shown in the articles.

Tags: Firefox

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