@mint @cassidyclown The issue is that Mozilla implemented some ::webkit CSS class functionality, but not all of it. There's an internal check in FE/Vue/something that checks whether some ::webkit class is supported and if it is, it uses some CSS settings from that class. Problem is that Mozilla implemented just enough for the check to pass, but not everything that is used and decided that when it encounters an unimplemented class, it should throw a syntax error instead of ignoring it. It's incredibly retarded.

https://mastodon.social/ap/users/115667120638353806/statuses/116509834068625047
https://shigusegubu.club/objects/1870c3cc-0dc7-4c81-b638-54174e671e29 (later in the thread)

What's even more retarded is that originally the request for supporting the classes was rejected as wontfix years ago: https://bugzilla.mozilla.org/show_bug.cgi?id=1432935