Tab Groups inaccessible
I have crated many tab groups. The "group your tabs" button on the top right indicates they are there (it is white) but I cannot now access the tab group screen. It was working fine but now is not.
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Can you open the panorama window via the Ctrl+Shift+E keyboard shortcut?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.org/kb/Safe+Mode