I have noticed that when Firebug is open and I am using the form plugin to make ajax calls on one of my sites that the following error message is generated many times (in Firebug) which not only slows down the page but can also cause Firefox to crash. Here is the message:
[Break On This Error] callback.data = aElem....getComputedStyle(
rfhelper32.js (line 348)
I've also noticed the same problem on a mobile site I'm working on which uses http://code.jquery.com/jquery-1.6.2.min.js
have submitted a ticket to Mozilla, but with no luck thus far.
Can anyone help me with this?