Firefox 120 to Firefox 141 Web Browser Benchmarks

I find that these days the browsers are all about the same performance-wise and it ends up not mattering much. PCs are so fast that it's very rarely the browser that is the bottleneck. Cool that they're still working to keep it snappy though.

I will say mobile is a bit different. I prefer mobile browser to apps when possible so I can have ad-blocking, but some websites run like complete garbage on mobile browser. They're so slow it's almost unusable. I'm almost 100% certain that's not on the browser itself though.

In my experience speed differences between browsers are indeed negligible on properly engineered sites/apps. Every so often I run into one that was only ever developed for and tested against Chromium and has major performance issues under Gecko and/or WebKit. Some of it might come down to poorly pruned or outdated polyfills, which in many cases are filling in for features that those engines gained support for quite some time ago.

I wish there were something that could thwart the “Chromium by default” assumption at large amongst devs, because it’s making the web worse than it needs to be.