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Firefox and Thunderbird stopped working

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RonOne
RonOne
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Windows 11 computer. Since 2 days Firefox and Thunderbird have stopped working. I get a blank browser and a Thunderbird without my emails. All other browsers still work and Firefox also works on my smartphone. I have followed the suggestions on the Support website, but nothing helps. What now?

Windows 11 computer. Since 2 days Firefox and Thunderbird have stopped working. I get a blank browser and a Thunderbird without my emails. All other browsers still work and Firefox also works on my smartphone. I have followed the suggestions on the Support website, but nothing helps. What now?

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