Works well initially but shuts off in a few hours. When not using the computer temporarily, "Send" permission flags stack up and I have been logged off of the website I was attempting to stay logged on to. Handy enough if you remember that you must restart it every day and that it only works for a few hours. I would like to be able to set a permanent 10 minute refresh that would persist whenever that page is loaded.

UPDATE
Ten months later. I'm still using this extension and can report the same strengths and weaknesses. It works well when it works but stops refreshing at unpredictable times. Sometimes it will load the following day but most often I have to reenter the parameters and activate it.