In my addon I have to submit data as urlencoded POST, for now I used a js script to do that (inject a form in the current page and submit it) but I wonder if there is a solution to do that with the Firefox Addon SDK?
I haven't found a clue in the high-level API but I am less familiar with the low-level, is it possible with the 'window/utils' openDialog method? There is some args parameter but I don't know how to use it.
Thanks.
EDIT
To be specific I need to mimic the behavior of an html form in a new tab.