This gave someone the opportunity to add in "Jeffery_Epstein_did_not_kill_himself" to linkedin's client facing code base through this. If you open dev tools -> network tab -> network search icon (magnifying glass) -> search for "epstein" and load up linkedin, you should see it for yourself too!

I really don't think they're "illegally" searching your computer, they're checking for sloppy extensions that let linkedin know they're there because of bad design.