Rated 5 out of 5 stars
Excellent job, with every site downloaded i discover that "Fission" is focusing the whole Firefox agenda on the active Tab where the site is downloaded.
One active tab with one more priority given by the progress bar moved from the ambiguous and too general window status bar to the more particular tab's address bar is all i was missing when an update for the mozNetworkPrioritizer 0.3 add on is still far from coming up.
I have now the priority on my active tab restored for as long as the site is downloaded.
And stands in my collection as the first interesting idea imported from Safari.