Gotcha ok, thanks for posting this! If you have the time, could you install Nightly and see if it's reproducible on there, too? We've been doing a rewrite of the Tabs Tray to a new UI framework, and I'm curious if this bug is also present there. I have a hypothesis what the root cause could be, regardless.
Bug 1850711 Comment 5 Edit History
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Gotcha ok, thanks for posting this! If you have the time, could you install Nightly and see if it's reproducible on there, too? We've been doing a rewrite of the Tabs Tray to a new UI framework on Nightly, and I'm curious if this bug is also present there. I have a hypothesis what the root cause could be, regardless.