I am sorry that I didn't provide the link, I assumed since the picture showed that it was a search engine add, that you could just pull up the
http://mycroft.mozdev.org/jsreq.html for that engine as you did already. Again my apologies for that, my bad.
Now your steps were correct, you go there, search for an engine, it gives you a list and when you click on it, it goes to the next page (referenced above and by yourself) and then it will install it and pop up to ask you if you want it to be used immediately. Now, my problem was that the domain mozdev.org was allowed at the root, so when I search and clicked on the install link, instead of doing it, it came up saying you don't have javascript enabled and specifically said if you have NoScript, allow it. But my problem was that it was already allowed, so why doesn't it see it?
Now, something that is significant and addresses what I said about the reload all pages or this page didn't reload, is this: 1) I went to the mycroft project page, 2) I went to NoScript (though the statusbar icon) and clicked on Allow mozdev.org at that level, 3) It didn't reload the page, even though I have that option checked, 4) I clicked on the install link and it opened up the next page when it would install and it gave the no JS error, 5) I checked NoScript as seen on the image and it was showing as allowed, 6) then I hit F5, still nothing (soft reload), 7) then I clicked in the url bar and hit enter still nothing (hard reload), 8) I then opened a new tab and went back to the mycroft project page, still showing the error that JS is not enabled, 9) then I did the search and clicked on the install link and still nothing, back to step (4), 10) I closed firefox and then opened it back up, 11) repeated process (1) through (4) and it worked fine this time and no JS error.
So I hope that clears up how I got the error and what I had to do to fix it and it didn't work until a restart. I am just wondering: 1) why did it not reload the page when allowed? 2) why did it still show no JS enabled? 3) why reloading and opening in a new tab not work still? 4) how come with multiple mozdev.org pages open, did allowing not reload them all? I think that's pretty clear now.
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3