firefox slow for non admin users with roaming windows profile
Hello, I manage a High school and after recently reimaging my Machines during the School holiday, I got users complaining that Firefox was extremely slow. I verified this and did a couple of tests. in fact If I log in as an Admin that has no GPOs applied and also uses a local windows profile I have no issues. but as soon as I log in with a user, who gets GPOs and has a roaming windows profile, Firefox is extremely slow and takes about 30 seconds to load a tab.
I'm running the latest update, and also created a new firefox profile on the server, to no avail. I also disabled ESET Anti Virus which did not make any difference. Ressources look good, no Spikes in used ressources and also the Event Viewer does not log anything firefox related.
What could be the culprit here?