After that, my browser seemed to spend a lot of time telling me that it was waiting for CoComment. I remembered that this was one of the reasons I dropped the service in the first place.
Then, I was using Flickr, and needed to go to a photo page. I got the waiting for CoComment line at the bottom of the browser, then it stopped responding. I had to reboot. I tried again, with the same result.
In uninstalled the CoComment extension, and the problem went away. I admit that my laptop is not the healthiest of computers, but that seems all the more reason not to overburden it.
I don’t think I’ll be CoCommenting again. I like the idea of the service, but not its implementation.