I joined Netscape on April 3, 1995 but in the server team, due to a temporary requisition shortage. I worked on what would eventually become HTTP 1.1, which we wanted to be more like SPDY or HTTP 2. Therefore I had only spare time to think about what became JS, and I used it to study HyperTalk, Logo, and other languages, not just Scheme or Self.
I finally got transferred to the client team one whole month later, in early May. Then I had ten days to demo-day.
Why do you feel compelled to make up a story? Because it sounds nicer to you to denigrate my work, it seems.