your memory does not serve you correctly. Cis is a descriptor, it just means someone whose body and gender identity match. that’s like saying straight is a slur.

so does that technically count as a scarf or a sweater?

most of the population isn’t tech-savvy enough to know about different browser types, or care about which one they’re using. The reason chrome is so dominant is because it comes pre-installed on many devices, and so people just don’t bother to change it.