[citation][nom]joe nate[/nom]Personally? Because I've tried Firefox 4, 5 and 10 and every one of them was laggier, buggier or otherwise slower than 3.6. I haven't tried any of the other ones, but I have no idea why, in my experience, 3.6 is just so stable and fast compared to everything else I've tried, thus, I've stayed with it.I wonder if the GPU acceleration they added to the browser actually slows it down, because I have a high end system, and offloading stuff to a GPU when my Intel i7-970 can more than handle anything a browser may encounter might create small delays that wouldn't be there in the CPU-only 3.6.But ultimately, I don't know why. I just know in my experience, firefox 3.6 (with it's addons like adblock plus) has been the most responsive, fast and reliable browser that I've tried.[/citation]
Funny thing about that... I'm running FF (more accurately, Pale Moon which is built off of FF) 11 and it is far faster than anything except for my Comodo Dragon (based off of Chromium) and even then, it's pretty close. It's also the most memory efficient browser I've ever had. It has Palemin, Adblock Lite, Fasterfox, NoScript, and Ghostery. Palemin keeps it's memory usage in check and it never goes over 50MB or so of memory usage, usually staying at or below 10MB of memory usage, regardless of how many tabs I have open (which can reach from the dozens to the hundreds).
As for pure responsiveness and speed, my Comodo Dragon installation beats out everything else, even if it's not by a huge margin, including FF 3.6.x. Even my Palemoon browser beats FF 3.6.x significantly.