[chillacy]

Might be more Firefox than your macbook or the web. I've noticed (while developing an extension) that Firefox feels noticeably more sluggish than Chrome. Safari somehow feels even faster than Chrome, but I'm too tied to the extension ecosystem of Chrome to switch.

[chaostheory]

I have the same experience with Firefox on OSX. I noticed that it isn't an issue with the dev version of Firefox with multiprocess turned on.

[mirsadm]

Firefox is definitely partly to blame. Chrome does work better and Safari is probably the best of the lot.

[jolux]

Safari is definitely faster than Chrome on Mac.

[ChristianGeek]

It also uses significantly less power.

[chillacy]

Alas I dream for the day when Safari adopts WebExtensions