https://support.mozilla.org/de/questions/1371429
Firefox block istalation of addon: "Browsing protection by F-Secure" | Firefox-Hilfeforum |...
by ffirefoxblockaddon
https://community.avg.com/t/istalation/304523
Istalation - General discussion - AVG Community
Apr 15, 2018 - Hello Mark, I can see that you have already contacted our chat support and confirmed that the issue has been resolved. Feel free to contact us again if you...
general discussionavgcommunity