Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

bookmarks sidebar won't open and can't get to setup menu

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

more options

I installed Firefox on my windows 10 computer. For two days it was fine. Now the bookmarks sidebar won't open but a checkmark appears next to the toolbars in view option. Also I can't get into the firefox setup on the top of the screen (the 3 dashes).

I installed Firefox on my windows 10 computer. For two days it was fine. Now the bookmarks sidebar won't open but a checkmark appears next to the toolbars in view option. Also I can't get into the firefox setup on the top of the screen (the 3 dashes).

All Replies (1)

more options

Start Firefox in Safe Mode to check if one of the extensions (Firefox menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox menu button/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window