I keen many tabs open all the time spread between 3 windows. With r145061 after the update webkit opens and than crashes after 1 sec. Returning to r144887 solves the problem and all tabs are loaded without a crash.
In the future, please attach crash logs for crash bugs. I'm going to assume that this is the same crash that was affecting many people today, bug 111721. *** This bug has been marked as a duplicate of bug 111721 ***