Most of the documents I produce are converted to PDF or printed, so I use Nimbus Roman or Nimbus Sans (I believe). I do use Open Dyslexic font
For UI I really enjoy Inter, although Ubuntu, Roboto and IBM Plex Sans are also nice
For terminal I use Hack, although Source Code Pro is nice
I’d much rather use a separate Firefox (now Mozilla I think) account for my professional work. I also would prefer having separate extensions, notably Zotero connector is kind of useless for my personal browsing