Rated 5 out of 5 stars

by Pchelobej on July 2, 2009 ·

download .xpi file
change file extension on .rar
extract and open in text editor file install.rdf
find maxVersion tag and change value on 3.5.*, save changes
add saved file in archive
change extension back on .xpi, and open in Firefox.
install add-on and have fun