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Why does the back botton have a extra leg that disappears when mouse is moved over it?

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There is a small "leg" on the back arrown that goes away then the mouse pointer is moved over it. Why?

There is a small "leg" on the back arrown that goes away then the mouse pointer is moved over it. Why?

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Do you have any Firefox themes installed which might be modifying the appearance of the back button?

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Ezalaki modifié na jscher2000 - Support Volunteer

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

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

You can try to disable OMTC and leave hardware acceleration in Firefox enabled.

  • about:config page: layers.offmainthreadcomposition.enabled = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.