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Weird black squares in browser (any page)

  • 1 reply
  • 1 has this problem
  • 4 views
  • Last reply by cor-el

Miszor
Miszor
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Hi,

After recent update i've begun to see weird black squares on all pages. They appear randomly and I can't figure out how to solve this. They disappear once i scroll the page or switch to another tab and go back again. Any help is appreaciated.

Hi, After recent update i've begun to see weird black squares on all pages. They appear randomly and I can't figure out how to solve this. They disappear once i scroll the page or switch to another tab and go back again. Any help is appreaciated.
Attached screenshots

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cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window