Only truly independent browser engine left. Firefox is entirely independent on google, but unlike its competitors this dependency is through direct cash payments.
Perhaps the Europeans will end up funding Firefox to get away from American corporate tech dependency. Firefox has tried valiantly to get away from Google money but it's difficult to fund browser development from small donations or without cross-subsidies from other business, like web advertising.
And Brave's built-in blocker uses uBO's and other lists, including allowing trusted filters (which can inject high risk scripts into your sites) automatically. So yes, you are using 3rd party scripts already, and no, they can't monitor all of the commits from all those lists.
Both browsers offer import/export functionality for all of those things. Spend one week trying Firefox and if you don't like it, switch back. The inconvenience here is so small it might as well not exist.
They push millions of lines of code every year, thousands of patches and all kinds of measurable performance improvements so not sure what you're talking about.
At their peak it was like 33% or thereabouts. The claim that they were "abandoned" suggests, well, that the browser was abandoned when it wasn't. It's a mischaracterization. Market share is about some combination of (1) software quality, (2) visibility and (3) distribution lock in. Chrome managed to be arguably better on (1) but it's due to (2) and (3) that it became dominant.
If (1) was all that mattered we would all be using the Preso engine version of Opera right now.
They literally abandoned the development for their toy projects until v57 (?) Quantum release. People left Firefox to chrome cos pages like google meetup and other things were not working at all. What are you saying?