The reality is, however, this:
1. The technology involved is lawful, and has been shown to either increase revenue, decrease costs, or both.
2. Mozilla and other browser makers are trying to do the impossible - compete with three of the largest for-profit corporations in the world: Google, Microsoft and Apple. That is an effort doomed to failure.
3. When I run across a site that doesn't work with Firefox but does work with Edge or Chrome, I have no leverage. My only option is to use Edge or Chrome. I can't get the site to fix their server or front end code, and I can file a bug report against Firefox but have no guarantee of a fix.
Mozilla will say with no sense of irony, "If a website doesn't work with Firefox, the website is broken." Firefox is still my main / default browser, but it is inevitable that enough sites will stop working with Firefox that I will be forced to switch.
@AlgoCompSynth @bagder I use the Samsung Internet browser made by overworked, underpaid South Korean IT engineers. 😑