Unable to scroll through tabs ... left arrow missing
The left arrow key to scroll the tabs is missing while the right is still there
The left arrow key to scroll the tabs is missing while the right is still there
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Do you have code in userChrome.css that might be causing this?
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.com/kb/Safe+Mode