Apple realizes that if they simply purchase the always-on-the-verge-of-failing Mozilla Corporation for a song, they can add that $300+ million a year from Google on top of the $12+ billion a year they already get from Google.
All 18 Firefox users get angry, some of them decide to fork it to keep in Gecko. Miraculously, 11 of them actually switch to the new fork, but t hen the remaining 7 decide Gecko is a waste of time and startup work on Servo again.
Remember in 2004, when nerds decided that KHTML (the granddaddy of WebKit) wasnt good enough, so they ported Gecko to Qt so browsers on KDE could use it instead of KHTML? That was 3 years before KDE replaced KHTML with WebKit, which Apple forked several years earlier.