(the USB Hub has an HDMI port on it, which I'm not currently using, but presumably it still appears like a potential display connection to my machine. I imagine that port getting disconnected is what's causing Wayland [and hence Firefox] trouble here.)
Bug 1918221 Comment 2 Edit History
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(the USB Hub has an HDMI port on it, which I don't have anything plugged into -- but presumably it still appears like a potential display connection to my machine. I imagine that port disappearing/reappearing is what's causing Wayland [and hence Firefox] trouble here.)
~(the USB Hub has an HDMI port on it, which I don't have anything plugged into -- but presumably it still appears like a potential display connection to my machine. I imagine that port disappearing/reappearing is what's causing Wayland [and hence Firefox] trouble here.)~ EDIT: I suspect this is a red herring; more details in my next comment.