Rated 5 out of 5 stars

Can you make it work with Postbox 3 please

This review is for a previous version of the add-on (1.0.8.1-signed). 

Download v1.0.9pre1 from here:
https://addons.mozilla.org/addon/noiascrollbars/versions/

This needs more testing, when used with "Postbox 3".