Flashing of the vertical lines in the tab bar?

There are small vertical lines in the tab bar. They appear after the closing of the tabs. They are flashing, then change places when I place the cursor on any Firefox buttons or bars. And sometimes, they are flashing and the text cursor in the address bar of mirror.

Disable all modules and themes does not affect them.

I'll try to add a screenshot of the problem.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/tools > Modules > Extensions) or if hardware acceleration is the cause of the problem.

  • Put yourself in the DEFAULT theme: Firefox/tools > Modules > appearance
  • Do NOT click on the reset button on the startup window Mode safe

Tags: Firefox

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