- add a new nsIWebProgressListener2 interface, inheriting from
nsIWebProgressListener, providing a 64-bit onProgressChange method
- make nsITransfer inherit from that interface, and remove an unused
progressListener attribute
- make webbrowserpersist support listeners that implement
nsIWebProgressListener2, and give them 64-bit progress values
- make nsIHelperAppLauncher's listener setWebProgressListener function take an
nsIWebProgressListener2 interface
And fix up all implementations according to that.
Added EmbedDownload to manage the downloads and HeaderSniffer to be used in "Save Target As"
( look for "content-disposition" to provide a filename ).
Changes for handling the unknown mime types/downloading.