I mean the title should be "... time to move to the other browser".
Safari is the new IE with extra iCrap on top.
Random browsers usually use one of the 3 web engines, but without browser polish, or functionalities like a working adblock. Those that don't are just someone's toys.
So the only real option is Firefox, and the Mozilla foundation lost 80+% of their funding because they can't get the Google money anymore. Maybe they'll start actually funding FF instead of some BS humanitarian work that I can bet was primarily lining their pockets...
I wish Apple would open source Safari, or at least make some "Safarium" others can build on. Would be an instant third player without all the growing pains.
Yes! In fact, Chromium was originally a fork of WebKit, as WebKit was a fork of KHTML. In both cases the codebases have diverged quite significantly though.
Smaller browsers built on webkit do exist; see 'Epiphany', 'surf', 'luakit', and 'Nyxt'.
Qt's web component used to be based on webkit as well, though they've switched to Blink (Chromium).
Unfortunately, none of the browsers listed above are 100% sufficient to replace Firefox. They all rely on GTK bindings on webkit, which has its own quirks; and none have support for webextensions.