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use a compressed image type like PNG or JPG to save the screenshot
Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.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 Troubleshoot Mode start window
Can you give more detail about what ribbon you are referring to ?
Can you attach a screenshot?
*https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
*use a compressed image type like PNG or JPG to save the screenshot
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Start Firefox in <b>Troubleshoot Mode</b> to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if <b>hardware acceleration</b> or if <b>userChrome.css/userContent.css</b> 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 Troubleshoot Mode start window
*https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
*https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems
