[timebomb]

Unfortunately, when certain (notably javascript-heavy) websites run so slow in Firefox, it's too frustrating to use given that Chrome runs them just fine. Even on a beast of a PC with more than enough RAM and a fast i7 processor, Firefox's Spidermonkey engine appears to just be far superior to Chrome's V8.

[jansan]

Seriously, why is the parent comment voted down? If you have ever compared Firefox with Chrome on a Javascript-heavy website, there is a clear winner at the moment, which is Chrome. I would love to see Firefox have larger market share, but it will not be achieved by buring your head in the sand.

[zzalpha]

Amen. I recently (like, in the last couple of weeks) gave Firefox a shot again and it's just objectively slower for my use cases. It sucks, but it is what it is.

[nachtigall]

You might want to give Nightly a try (upcoming Firefox 56) which improved a lot thanks to Quantom Flow project. I updated from Firefox Dev Edition (FF 55) to Nightly and the boast was obvious (there's also been a good boast recently in FF 54 thanks to multi-e10s).

e.g. see the SpeedometerV2 benchmark differences at https://ehsanakhgari.org/blog/2017-06-23/quantum-flow-engine... So there is progress and thanks to Quantum the best is hopefully yet to come with the integration of Servo components