i thought i found a bug in FF: https://bugzilla.mozilla.org/show_bug.cgi?id=568779

but if you read the response i got from the mozilla team, you see that it's a "feature".

how does it work exactly?

if you have a form, and you have a form element in it, with name or id having one of the attribute names of that form (name, action, ...), the form attribute in question becomes readonly with the generic accessors (the property), however, the setAttribute() function works as a workaround.

in my code i had to do:

.attr(k, v)

IF .attr(k) != v

.get(0).setAttribute(k, v)

my proposal is to fix this workaround inside the .attr() function. so that this "feature", will not be problematic with all those users. it lost huge amounts of time due to this "feature"