What's with the new querystring text highlighting feature in Chrome?

This feature in #fragment strings (not to be confused with ?query strings) appears to be documented in WICG/ScrollToTextFragment. (WICG is a W3C-run "community group" which proposes new features that might, or might not, eventually become standards.)

Google's likely adding this feature because its search engine has already supported linking to specific sections if the website already had the appropriate anchor tags, but many sites don't have any anchors defined.

Other browsers probably aren't very interested in this feature, as they don't run a search engine as a business.