Firefox 9 painfully slow site loads

Since upgrading to 9 I find that visiting web sites invariably means a 10 second or more wait until they load.
Once the site eventually loads subsequent clicks to other pages are much faster.
This happens even with all add ons deactivated.

SOLVED for me:
I had the same issue. Firefox 3.6 was just fine loading pages, switching between tabs, etc. Firefox 8 & 9 were just awful - not just page load speed, but switching between loaded tabs, accessing Firefox menus - everything was really poky.
I did an uninstall with RevoUninstaller, then made sure every trace of FF was gone, and then did a clean reinstall of FF 9.1 - still the same problem.
FF 9 ran just fine in Safe mode, so I disabled all plugins, and no extensions were installed yet, but no difference.
Then I looked over Help/Troubleshooting from the FF 9 menu, and noticed that OpenGL might be enabled for faster graphics rendering. I know that other apps (Photoshop) can actually slow down if your video card doesn't fully support OpenGL acceleration.
'''TRY THIS'''
So I looked in FF Options/Advanced and noticed under the General tab that hardware acceleration is checked by default.
I UNchecked hardware acceleration and now it's back to normal - and somewhat faster than 3.6. YAY!
I'm not sure if my OpenGL theory is correct, but that fixed the slowness for me.
(running Windows 7 64-bit with a first generation AMD 64 X2 Dual Core; Nvidia Geforce 6800 video card)
Sam

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