I only have SPDY on SeaMonkey and earlier today I disabled it in about:config. That was after I tried to install the SPDY indicator 2.1 and it won't install on SM.
So, I disabled SPDY as I would want to know when it is being used. Then I went to SM support newsgroup and asked about the extension and if/when it will be available for Sea Monkey or if there is a trick to get it working now on SM. I got one reponse so far and it was "Huh"? Someone who didn't know about SPDY like I didn't until this thread.--
When governments fear people, there is liberty. When the people fear the government, there is tyranny. Thomas Jefferson