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Firefox Dev file import requesters extremely slow on High Sierra (macOS 1`0.13.6)

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Dear Firefox Geeks—

After the last update to FF Dev 85.0b5, when a web site give me the option of uploading a file, the system file navigator invoked by FireFox Dev effectively freezes for 10 to 20 seconds, or more. During that time the file selector window does not respond to navigation clicks. When it finally does, it then does not respond to file selection clicks, and after it does, does not respond to 'choose' button clicks in the lower right corner of the window.

Just thought you might want to know.

Best Regards,


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