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Firefox freezes after waking from sleep on M1 Mac

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Hi Guys,

I have a problem when I'm waking up PC from sleep mode. Please help me if you have ideas or solutions.

In my case, Firefox doesn't accept any action (scroll, click). The only solution is terminate Firefox by cmd+Q shortcut, and after restart, it works properly.

I can see same problem with my Mac Mini M1 and Macbook Air M1, but it didn't happen on Intel Macbook Pro.

Here's my environment,

OS:Mac OS Big Sur 11.2.2 Firefox:86.0 Display:Dell Q3219U Connection:USB-C to USB-C or USB-C to Displayport

Thanks in advance,

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