For browsing, Mozilla is probably the least likely to want to do this sort of logging. There are probably more niche browsers that focus on privacy that I'm unaware of too.
As for other Apple products, you can run Linux on a MacBook quite happily (Linus does, after all) and there are some nice Android ROMs which focus on freedom, such as Replicant.
> Before blocking the site, Firefox will request a double-check to ensure that the reported site has not been removed from the list since your last update.
The entity I'm primarily worried about tracking here is Google.
And, pretty much trivially, if the URL was added to the blacklist, they have the corresponding URL to the hash.
(Not to mention, even if they didn't, their core product is based around crawling webpages. I'd be highly surprised if they didn't have hashes of the URLs they visited.)
And, even beside that, URLs are relatively low-entropy. Especially with the path-splitting that safe-browsing does.
Nope. Firefox hide away stuff in about:config for testing purposes generally and expose the setting in the user interface after its been tested enough.