Hello there, This issue could be caused by add-ons / extensions installed in your browser. If you go ahead and disable them and see if that solves the issue. https://support.mozilla.org/en-US/kb/disable-or-remove-add-ons 1. Click the menu button and choose Add-ons. 2. In the Add-ons Manager tab, select the Extensions or Appearance panel. 3. Select the add-on you wish to disable. 4. Click its Disable button. 5. Click Restart now if it pops up. Your tabs will be saved and restored after the restart. Give those steps a try and keep us posted. Hope this helps!