Question

Why is Firefox lagging so badly and performing so slowly? Reset did absolutely nothing.

I have Firefox 16.0.1, and as of lately, it's become too unbearably slow for me to continue using it. Even when typing this message, at certain points it will lag. When switching to new tabs or clicking links, it lags HORRIBLY. At least 4-5 seconds of wait time. And now it's started to screw up my enjoyment of YouTube videos by lagging when scrolling down the page (as it does with other sites) and lagging the video itself. I've tried the reset feature. That did absolutely nothing for me.

The only add-ons that I have are AdBlock Plus 2.1.2 and the FTDeepDark 4.8.3 theme. And I've already tried disabling (even removing) them to no avail.

What must I do for Firefox to run properly and quickly? I've been a huge fan up until now, and I'm seriously fed up with it. I have a very quick laptop (Win7, i7920XM, 8 gigs of DDR3, 256GB SSD, dual 5870 GPUs, etc.), and Firefox has always run great up until the past few month.s

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