Rated 3 out of 5 stars

After installing this add-on I can't see the SPDY lightning bolt on https://twitter.com or https://google.com. How am I doing it wrong? Regardless, thanks Cheng Sun for making this add-on, it looks like many have found it useful.

This review is for a previous version of the add-on (1.1). 

Disabled by default?

In Firefox 11/12, SPDY support is present but *disabled* by default. You will have to go into about:config and set network.http.spdy.enabled to true.

In Firefox 13+ SPDY is enabled by default. If you are using those and are still not seeing the SPDY icon, please try https://spdytest.com/. If that still does not show the icon, please file a bug at https://github.com/chengsun/moz-spdy-indicator/issues giving details such as OS and Firefox version, and also whether there are any errors related to SPDY indicator in the Error Console.

It is known that Twitter will only sometimes serve HTTPS pages over SPDY.