Firefox might be the "lesser evil" but that don't mean they're a saint.
If you're concerned about privacy you're gonna have to do abit of the legwork yourself. Arkenfox Is probably the quickest way to harden standard Firefox and I've used it for years without issue.
If you want a more out of the box solution then then Librewolf is a privacy focused fork with much better defaults and most of the questionable crap just ripped straight out of the code.
Both excellent choices. Mullvad Browser and Tor are also options but the ones you mentioned are better for the average end user who cares about privacy. Since 95% of people I know do not.
I use all four in different machines and for different tasks.
Firefox is full of tracking and paid advertisement links (default links on homepage and new tab page, stories, etc.), but this can be cleaned out quite well through user.js settings.
Yup, pocket is super easy to remove, so it's really not an issue IMO. It's scummy that it's enabled by default, but it's about the easiest anti-feature to remove.
Mozilla didn't hear you, and they're adding a shopping addon instead. Thanks to buying a company that trafficks in private data, which is now an official Mozilla subsidiary.
That's right, Mozilla is now an adtech company.
At least Pocket is "universal" -- it works on every site. The shopping extension only works on the three biggest commerce websites within one country.