One of 6 firefox windows has an = sign infront of it and the window is inacessible.
second Firefox window shows =G this window was open on Googlemail. Since this = sign appeared I am unable to access this window. Clicking on this window turns the = on or off but has no other effect. There are about 100 tabs in this window all of them unavailable.
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Select that tab and post another screenshot.
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 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