I've lost hope for Firefox when the browser started opening spyware-infused ("tag manager") sites describing how Mozilla takes privacy seriously, immediately after browser's installation and before the user has any chance to add uBlock Origin or other Firefox add-on that limits spyware/malware execution on their device.
On first run it will open 2 pages on the Mozilla website, all of which embed Google Analytics and/or Tag Manager.
Mozilla claims they have some special agreement that supposedly prevents Google from using this data for advertising purposes but if you actually believe it then I may have a bridge to sell you.