Rated 5 out of 5 stars

by Pete Stephenson on Sept. 25, 2011 · permalink

This add-on is simple, yet highly effective at detecting potential issues (e.g. man-in-the-middle attacks, unexpected certificate changes, etc.) related to SSL certificates.

In general, it is quiet and stays out of the way. In the few messages it presents to the user, it provides useful commentary about whether or not the change it detected is likely harmless or malicious, which is useful for non-technical users.

I highly recommend this add-on.