Of all the stupid features from Chrome to pick up, the version numbers is, by far, the dumbest. Has anyone considered how stupid a version number in the high double digits might be? Firefox 81 seems kind of clunky, doesn't it?
Only because you/we are not used to it. Who cares? By Chrome 26 and Firefox 12 we won't really look at version numbers like we've done in the past (or look at them at all...), and only see two web browsers that are releasing time-based releases as opposed to feature-based releases where the point won't be to market by features and version numbers, but by following the latest web standards and web browsing trends well.
AFAIK, Firefox is also moving to silent updates, yet a move aimed to remove the old "launch party" thing with new releases that were once released as rarely as once per year, with long, long QA phases at the end to test the huge beasts of new features, bogging everything down before the developers could pick up speed again.