Rated 4 out of 5 stars

Thanks for the response, I've fixed it up now. I still think an option in the drop-down box would be easier for a lot of users though.

For anyone who hasn't worked it out, you go to View --> Toolbars --> Customise... then you drag the icon onto the customisation window which opens, click 'Done', then restart Firefox.

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