Hello everyone, While testing some fan-made game community websites, I noticed that Firefox handles them a bit differently compared to Chrome or Edge. For example, I checked https://nullsbrawl.tech/ (not an official site, just a community project) and saw that it loads more slowly and sometimes behaves differently in Firefox. This made me curious: Does Firefox have different handling for script-heavy or unofficial community websites? What tools in Firefox Developer Tools would you recommend for debugging performance issues? Are there guidelines for developers to make such sites more compatible with Firefox? I’d love to understand more about how Firefox manages these situations. Thanks in advance for your help!

Interesting test case! Fan-made sites often have messy or script-heavy code, which really puts the browser engine to the test. Have you tried using Firefox's Performance Profiler (about:profiling) to see which scripts are spiking CPU or memory? Might help pinpoint what's causing slowdowns.