Is your feature request related to a problem? Please describe.
Right now only CSS selectors in the form of div[data-sanitized-class~="classname"] work as CSS selectors even though I expect .classname to work as well.

Additional context
This seems to be a regression due to #7037 because it worked before fixing that. Additionally due to this change all CSS selectors I have set for my feeds don't work anymore due to the new syntax used.