[Greasemonkey] How to find the URL of the page that is being displayed.

[Vikas Pandey]

I am taking the screenshots of some pages that are displayed, but 
ScreenGrab includes only what is visible in the FF window and excludes 
the frame and Location bar.

To include the content of address bar, I am thinking of putting a gm 
script that would take the current content of the Location box and would 
add at the top of the page in the current tab, so that the url is 
included in the screenshot.

How to get the current URL into gm?

thanks.
-- 
Vikas