I think usually the term “browser wars” refers to the time when Netscape and Microsoft were struggling for dominance, which concluded in 2001. JavaScript JITs

I think usually the term “browser wars” refers to the time when Netscape and Microsoft were struggling for dominance, which concluded in 2001. JavaScript JITs only emerged around 2008 with SpiderMonkey’s TraceMonkey, JavaScriptCore’s SquirrelFish Extreme, and V8’s original JIT.