Even if you find an alternative it might not help you if not all the others would follow, too, and you could find the type of content and contacts you currently have in FB on that other platform.
Same problem with many social networks that became toxic, but that can’t be replaced easily, because in other, better places, you might not find the same content and contacts.
Me neither, but I guess the tracking will also take place when you just browse the internet and visit websites, that have Google Ad Tracking technologies implemented (which could be the majority of websites). Tracking and Ad-Blockers like uBlock might help a bit, though.
The specifics are complex—these are the algorithms that ingest all the data signals you give off when browsing the internet on any device, some based on who you are—device, IP and credential identifiers, but also the sites you visit and apps you use as a map to be followed and analyzed.
Same here. I was a uMatrix user for a long time and I was astonished sometimes how bloated some sites were with scripts and tracking domains. Nowadays I mostly use Edge on my work machine which is somehow ad-free but all sites work.
Firefox with uBlock / uMatrix needed often too much fine tuning to make sites work properly.