Mozilla Firefox is Frozen

1 minute read

Description of Scenario

This is a real case scenario that happened to me while visiting a web page about social media buttons. Suddenly Firefox stopped responding, and it became frozen. I killed the process and tried to start again the application, but I got the same behaviour.

How to fix in Ubuntu OS

This is a restore procedure where you do not risk to loose anything and you do not need to make a backup or a copy of your files ! We will create a new Mozilla Profile.

  • Locate your Old Default Firefox Profile

    Firefox Profile is the folder where Firefox stores your bookmarks, passwords and other user data. Normally you will find it under ~/.mozilla/firefox. OK, I think the most important file you want to restore to a new Mozilla Profile is your bookmarks database places.sqlite. You can try the following commands to search for this file and the location of your profile at the same time.

    sudo updatedb
    locate -i ~/.mozilla/firefox*places.sqlite*
    
  • Create a New Mozilla Profile

    • In Ubuntu the easy way is to use the Firefox Profile Manager. At the command line enter firefox -ProfileManager.

    • Hopefully a Firefox - Choose User Profile window will come up and you will see your default Profile. Click the _Create Profile... button and enter a new profile name. That will create another Profile under ~/.mozilla/firefox.

    • Do not delete the old profile, just select the new profile and check the Use the selected profile without asking at startup.

    • Finally click Start Firefox button. Configure Firefox, e.g. add your extensions, then Quit.

    • Overwrite the places.sqlite file of the new profile with that of the old one. Start Mozilla again press Ctrl+Shift+O to see your Bookmarks.

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2015

Mozilla Firefox is Frozen
Firefox hangs, it stops responding even after restarting the application
This is a real case scenario that happened to me while visiting a web page about social media buttons. Suddenly Firefox stopped responding, and it became frozen. I killed the process and tried to start again the application, but I got the same behaviour.