Mozilla has lost touch with its primary user base. Firefox users are dedicated and actively choose to install Firefox on their devices, even over other popular browsers such as Edge, Safari, and Chrome. They are considered power users, and any shenanigans toward them (such as displaying full-screen VPN Ads) could result in them switching to a different browser. Mozilla stops Firefox fullscreen VPN ads after user outrage https://www.bleepingcomputer.com/news/security/mozilla-stops-firefox-fullscreen-vpn-ads-after-user-outrage/