When was the last time you used Firefox? They've put a ton of work into performance, which involved a serious rewrite. Current versions are now much faster than

When was the last time you used Firefox? They've put a ton of work into performance, which involved a serious rewrite. Current versions are now much faster than Chrome (for me). A bit more technical: A big part of why it was so slow, is that the engine was written before tabs ever existed, before CSS and JS (both) became so heavy, and before computers had so much disposable RAM. It kept everything in a single process, on a single CPU. The rewrite makes firefox multi-process and multi-CPU core capable. It makes the browser feel MUCH faster and lighter! The functionality is nicknamed Electrolysis or e10s, and they've been gradually rolling it out since March of this year. The work effected extensions in particular, so they have to roll out slowly. About 30% of the stable-release userbase has multi-process at this point, and they're just starting the follow up rollout enabling multi-core. Give it a try! Try the firefox beta (https://www.mozilla.org/en-US/firefox/channel/desktop/ https://www.mozilla.org/en-US/firefox/channel/desktop/) or better yet, Firefox Developer Edition. If you want to see the full speed improvement of multi-core, go to about:config and set services.sync.numClients to something higher than 1. (they're rolling out with a value of 2, and ultimately ending on 5).