Rated 4 out of 5 stars

WebPG brings GPG cryptography to the browser. I primarily use it for signing / encrypting (and verifying / decrypting) emails using gmail. The web interface for gmail has evaded cryptography for a long time however, this addon does seem to work.

The gmail integration is labelled as "very beta" and I think this is true. However, if all you want is the four basic functions, it works well enough. There are a few tiny workarounds that you may need to do (eg. I've found that I need to use the popped-out compose window for webPG to work correctly).

All in all, a very good start to bringing cryptography to the web. For far too long people have been unable to use cryptography inside the many browser-based communication methods that we use now.