FF problem with Online Safety
After the latest upgrade of F-Secure TP, now Firefox doesn't work correctly: some web pages load very slowly, or they don't load for half hour and then suddenly all of them load together for no reason, and then again trying to do anything it takes half hour to load.
(yet they don't fully load sometimes, as they have "missing images")
And yes, some webpages load at that same time with no problem.(I.e. several take half hour to load, when others load with no problem)
Disabling Online Safety add-on doesn't do anything. So I need help.