Hello ! I'm a Mac user with Mac Os Big Sur 11.4 When i click on a link in an e-mail on the app "Mail" or in other applications Firefox (89.0.2 64 bits) open the link in 2 different windows : (1 window for the link destination and 1 window for the firefox home page i've set) I would like to have only 1 window opening when i click on the link. I've checked on the net and tried the solutions i've found but nothing works... If i use "Safari" instead of Firefox as my default browser it works properly. Any idea or suggestions please ? Thanks a lot for you help. All the best, Antonio