a little OT
but this is very nice
and you get a .XPI Dokument,
As you know the file is an xpi file but your system does not know what program to use to open that extension with, so just right click on the file you have downloaded and have it open with Firefox. The install box will then open up and you can install it. After you close Firefox and reopen it, go to tools then click on extenions. Double click on the Seti@home user stat extension then enter your seti account number. Your stats will then show up on the bottom right corner on you status bar.
and then…
you have a BOINC Counter at Firefox
found this at the Boinc Forums
http://setiweb.ssl.berkeley.edu/forum_thread.php?id=7526#57578
Sir Ulli