FF has been getting slower and slower. I've run them side by side on my home box for several months now, and the difference is hugely noticeable. But i have other issues. Suddenly, flash videos in Chrome no longer have any sound, but work fine in FF. OTOH, had issues with FF and flash as well - one version of flash would completely lock up FF, had to "downgrade" flash in order to get the browser to work at all.
At this point, I don't know which actually works right. I don't need/want 15,000 plug ins. I want a browser that works, blocks ads/popups/malware, and that's about it. FF used to be that. But more and more bloat keeps coming. Browsers are starting to turn into Real Player...