One thing you can do in Firefox that is nice is, on poorly designed websites that prevent you from pasting in your password, reclaim the power to paste in your password. See here.
My reward for filling out a long form (complete with yet another classic, silently truncating your entered password) was this:
HTTP Error 500|
500 Internal Server Error
This server is incapable of servicing your request. Please try your request again later.
We apologize for any inconvenience this may cause.
If the problem persists, please contact a representative of ADP to assist you.