Comment 58 for bug 223238

User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4

Running: Ubuntu 8.10 & 9.04, NVIDIA GeForce 8600GT, and NVIDIA 180 series (newest) graphics drivers. Also running Compiz-fusion built into Ubuntu.

Problem: Lots of websites that seem to use Javascript/Ajax heavy scripts run VERY slow with NVIDIA drivers. This appears to be a Firefox issue because I can run Opera, WebKit based browsers, etc and there is NO issue in Linux. Only Firefox.

Example websites:
http://www.shacknews.com (during the main image transition to a new one the browser slows to a crawl and wont even scroll)
http://www.slashdot.org (when scrolling to button the new ajax page reload slows browser down)

Tons of websites have this problem with the Firefox 3.0/3.5 + NVIDIA drivers. Those are just 2 test sites.

I have tried a hack suggested on Ubuntu's bug page(with same bug):
nvidia-settings -a InitialPixmapPlacement=2
But it really does nothing.

There is a long running bug page on Ubuntu's website that could be helpful to devs:
https://bugs.launchpad.net/bugs/223238

Please Help!

Reproducible: Always

Steps to Reproduce:
1. Run Linux with newest NVIDIA 180 drivers
2. Run Compiz-fusion
3. Run Firefox 3.0 or 3.5 with any of the websites listed
Actual Results:
SLOOOOW performance. Seems to be javascript/AJAX related.

Expected Results:
Normal fast performance as seen with other web browsers.