Letterboxing wastes 1/3 of screen area on Cinnamon/Linux in Tor browser(1600x900 resolution)

Hi! I've read the about the purpose of Letterboxing and understand it.

I'm fine with small bezels/Letterboxing, but on my screen (1600x900) on Cinnamon/Linux bezels are HUGE (on each of 4 sides) and it takes/wastes 1/3-half of the screen area in Tor browser. I'm happy to provide a screenshot, but couldn't find any way to upload it here. I suspect 1600x900 resolution isn't very popular and may not be well tested.

I reproduced it both with Tor official repo and flatpak multiple versions. I tried creating GIT account half a year ago (on gitlab.torproject.org) and it never got approved. Tor browser v14.5.2. Cinnamon 6.0.4. Thank you.

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