‘Normal’ Mint is still based on Ubuntu, but there is LMDE (Linux Mint Debian Edition), which is Debian based.

I thought Adnauseam was only to screw over the tracking by clicking every ad, as clicking ads generates revenue for the site?

I’m not sure what kind of features Edge has for PDFs, but FireFox has recently gotten an update to it’s PDF editor so you can edit them in FireFox. Might be worth checking out if that is truly the only reason.