Firefox Slow Performance on JavaScript-Heavy Pages Compared to Chrome?

[whatnetwork]

I've been noticing that Firefox tends to lag or become unresponsive on certain JavaScript-heavy websites, especially when handling dynamic input fields or real-time data validation. For example, when processing live input validation using JavaScript, Firefox seems to have a slight delay compared to Chrome, which handles the same script smoothly.

One case where this is noticeable is on websites that use real-time network detection based on mobile number prefixes. Has anyone else experienced similar slowdowns in Firefox when dealing with JavaScript-heavy form validation? Could this be related to Firefox’s rendering engine or specific security restrictions that affect JS execution speed?

[Drago49]

True, if you check any javascript benchmark sites such as https://chromium.github.io/octane/ you'll get that chromium to be much more faster, any performance testing such as looping would get firefox on average much higher time to complete. i know this is a something that mozilla's already known problems to fix, but i do think all the roots of cause of slow performance of firefox are simply javascript's calculation.