Cannot use monitorEvents getting error monitorEvents is not defined

[Adam D]

Hi all,
I am new in the world of Javascript and I am having the following
problem. I am trying to catch an event in mozilla firefox when a
textarea is changed by the autocomplete and specially from the
username/password reminder. I have tried a lot but it doesnt seem to
fire an event. So I though that if I use firebug to print me all the
events I will manage to locate the one that I need. But unfortunatly I
didnt manage to have firebug working. Any help will be really
appeciated and maybe a small example will be great.

Thank you all
Adam

P.S.
I am trying to receive all the events fired from the web page.

Error console:
monitorEvents is not defined
[Break on this error] monitorEvents(object, types, context);