What's a unique customization on your Linux machine you think no one else has?
Just wondering since I know a lot of people quietly use a screen-area-select -> tesseract OCR -> clipboard shortcut.
I separate subjects of interest into different Firefox windows, in different workspaces -- so I have an extension title them and a startup script parse text to ask the compositor to put them in the correct workspace (lets me restart more conveniently).
I have automatically-set different-orientation wallpapers for using my 2-in-1 depending on whether I use it in portrait or landscape (kind of just for looks, but I don't think if anyone else adds a wallpaper change to their screen rotation keybind).
I have an old gamer keyboard with extra programmable keys on the side, which I use for cut, copy, paste, close tab, close window, etc. Logitech provides drivers/software for Windows & Mac only.
To make it work I have a custom monkey-patched USB driver that I compiled from source, some weird daemon that interacts with the driver and some shell scripts on top of that. I'm not sure how but it works thanks to a 9 year old youtube video made by a guy from eastern europe somewhere.