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Firefox crashes when system file dialog is displayed

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  • Firefox crashes whenever the Windows file dialog is displayed (e.g. if choosing a save location when downloading files).
  • SolidWorks PDM appears to cause this, see information here: https://forum.solidworks.com/thread/220894
  • Until two days ago, running Firefox in Windows 7 compatibility mode solved the problem. However running Firefox in Windows 7 compatibility mode now results in blank tabs - similar to as described here: https://support.mozilla.org/en-US/questions/1231445.

So I am caught between a rock and a hard place. I have to switch off compatibility mode for browsing to work. But then Firefox crashes any time I want to download or upload a file.

If anyone has any idea's I'd appreciate it. I really don't want to be forced back onto Chrome...

* Firefox crashes whenever the Windows file dialog is displayed (e.g. if choosing a save location when downloading files). * SolidWorks PDM appears to cause this, see information here: https://forum.solidworks.com/thread/220894 * Until two days ago, running Firefox in Windows 7 compatibility mode solved the problem. However running Firefox in Windows 7 compatibility mode now results in blank tabs - similar to as described here: https://support.mozilla.org/en-US/questions/1231445. So I am caught between a rock and a hard place. I have to switch off compatibility mode for browsing to work. But then Firefox crashes any time I want to download or upload a file. If anyone has any idea's I'd appreciate it. I really don't want to be forced back onto Chrome...

Chosen solution

In case anyone comes across this question, Firefox 73.0.1 is now working in compatibility mode again.

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  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0

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Question owner

Some additional information in my original (archived) question here: https://support.mozilla.org/en-US/questions/1214584

Some additional information in my original (archived) question here: https://support.mozilla.org/en-US/questions/1214584
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Chosen Solution

In case anyone comes across this question, Firefox 73.0.1 is now working in compatibility mode again.

In case anyone comes across this question, Firefox 73.0.1 is now working in compatibility mode again.
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