Does it make a difference if you select the light theme? Did you try Troubleshoot Mode?

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

• switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click "Refresh Firefox" in the Troubleshoot Mode start window

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

If the new profile works, you can transfer files from a previously used profile to the new profile, but be careful not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

I have the exact same issue.

After upgrading to 132.0b2 (aarch64), all my browser UI settings are gone and the bookmarks toolbar is blank. The bookmarks are still there, however they do not show.

Following cor-el recommendations, I was able to reset and get the UI similar to what it was. One extension is not visible and it's a little funkier but the bookmarks are back.

The way I resolve it was creating a new profile following this link: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles

Does it make a difference if you select the light theme?

No difference, same result.

Did you try Troubleshoot Mode?

No difference, same result.

You can create a new profile as a quick test to see if your current profile is causing the problem.

This one did work, however, didn't restore it as it was. It had some weird issues.

Alright I think that the devs had probably created a bug on some profiles as troubleshot mode doesn't make any difference but a brand new profile fixes the problem as whole so I am not willing to give my data up as there is a sync chain between three of my devices : my tablet, my phone and the laptop which has the problem. I would try to back up the browsing data and reset the app and then restoring it anyway thanks for your help :-)

Try to go to menu ≡ -> More tools -> Customize toolbar…, then click the Restore defaults button.

Okay Now the problem is fixed At first thanks to you both as you have helped me fix my problem For the near or far future this is how I had solved it without losing any data For windows

• Open the settings
• Open the apps tab
• Initiate the uninstalling software for Firefox
• Click on restart the browser

For Mac I am actually not that familiar of Mac devices so I will let the community to post a detailed way for Mac as the whole idea of this process is resetting the browser anyway thanks again for help:-)