Hello,

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• You can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
• Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

Do you mean the extention "New Tab JumpStart"?

The developer posted a new version on the Add-ons page that has not yet been approved for release to the main page, but you can access it from the Versions page. It has the description "Fixed breaking issue with Firefox 22": https://addons.mozilla.org/en-us/firefox/addon/new-tab-jumpstart/versions/

Thank you, this was the answer I needed. The new tab jumpstart page is working perfectly now.

Thanks for all replies!