Good idea – works well Rated 5 out of 5 stars

The plugin should state more exactly what it does.
It seems like it sends the referrer only when requesting resources with the same domain name. AND it considers SUB-DOMAINS to be the SAME domain.

I'm using Firefox 11.0 on Mac OS X 10.8 (dev preview 2) and the plugin seems to work well.

Thanks a lot!

update: Thanks for your response, meh! I think that's a good way to handle it.

This review is for a previous version of the add-on (0.0.3.2.1-signed). 

About subdomains being considered the same domain, I added an option called `extensions.smart-referer.strict` that when disabled will take as same domain the subdomains, by default it will take subdomains as different domains.

It will be there as soon as the reviewers review it.