No, it has very little if anything to do with Javascript. My charitable reading is that people are using JS as a colloquial term to refer to the Web as a platfo

No, it has very little if anything to do with Javascript. My charitable reading is that people are using JS as a colloquial term to refer to the Web as a platform in general. To the extent that it's a browser problem at all, it's a problem with how browsers as a platform handle HTTP requests and site-isolation, which is a security system that predates Javascript.