[phrz]

This has existed for every web engine since time immemorial, calling out Safari is misleading. Firefox calls them "site interventions" and Chrome calls them "patches" rather than Safari/WebKit's "quirks".

[kalleboo]

And beyond web engines, operating systems have them too - both Windows and macOS have workarounds for popular apps.

[kmlx]

gpu drivers with patches for individual games.

[nightpool]

Do you have a link to the Chrome site-specific patches directory? As you can imagine, it's pretty hard to search for :P