There definitely seems to be a conflict with the Chase website and one of the Firefox extensions, add-ons or plugins. I'd been having the same problem with lag while using the Chase site, so I had switched to Chrome when I wanted to access to my accounts. That is, until this afternoon when I cleared my cache and history in Chrome and subsequently went to Chase where I was confronted with a user authentication request. Not wanting to deal with an extra hassle, I decided to try it in Firefox to see if the problem might have been fixed since I last tried. Nope. Same terrible lag. After a little research, I discovered another thread on this issue that suggested using Firefox safe mode (not to be confused with using Firefox while WINDOWS is in safe mode...). Bingo. Logging in to Chase was suddenly about as troublefree as it is when using Chrome. Of course I don't know WHICH add-on or extension is the culprit and I'm really not feeling ambitious enough to check them one by one right now, but at least I know that I can access Chase successfully through safe mode when I need to.

Had this problem on Ubuntu 11.04, 64 bit. Disabled the extensions "Global Menu Bar integration1.0.7" and "Ubuntu Firefox Modifications 0.9.2" and chase.com behaved much better. Kind of scary actually; I wonder if either of those has been hacked to become a key logger for banks or something.

Was having this issue with Chase online banking. Decided I'd check my FF add-ons. Found one I didn't remember adding. Logitech Device Detection... apparently only used when you use Logitech online support! Now that is not something I do every day (!) so disabled it and restarted FF. So far, Chase website working like it used to do before I installed my new Logitech webcam....

I hope Logitech are having fun with all my private details!

J/K

I hope....