No, I'm not, actually. Just your standard, Dell-issued laptop drive.

I noticed better memory usage and general performance increases within the last few releases to the beta channel (sorry, I can't pinpoint which one it was). I started to use FF again a few months ago, and found I still needed to restart the browser at least once a day to keep things responsive (and I don't usually have more than a dozen tabs open). Then, after one of the updates, I didn't need to do that, and I didn't notice any performance degradation over the course of several days.

It's more than performance, they've also picked up must have features like opening up just closed tabs (cmd+shift+t), and cmd+9 to go to last tab, private windows (used to be all of firefox went private), quick updates.

A few hours after I wrote this, my FF updated itself (to version 20.0) and became much, much more responsive!

Tr changing some disk-related settings in about:config.