Rated 3 out of 5 stars

Here's what she says :
"Firefox could not install the file at
https://addons.mozilla.org/en-US/firefox/downloads/file/70776/signature-4-fx+tb.xpi?src=developers?confirmed because: Not a valid install package
-207"
Sure wish it worked in FF3.5 especially since "paste email" doesn't work anymore either.

This review is for a previous version of the add-on (4).