[Project_owners] help with web progress listener

[Neil]

Eric H. Jung wrote:

> You were right, Neil. gBrowser.mCurrentBrowser.addProgressListener() 
> does the trick. Assuming I want the loading status of all resources on 
> all pages & tabs, I should do this for all elements in 
> gBrowser.browsers and all new tabs, right?

Correct; the tabbrowser only forwards the minimum notifications needed 
to drive the browser UI.