Exactly What I Needed Rated 5 out of 5 stars
I've been looking for something like this for ages, greasemonkey scripts just don't have the ease of use that this extension has and it's so useful... Combine this with an app such as Firebug to read the code in a site and your able to do almost anything to a page or site.
This app is so easy to use I picked it up in minutes :)
Note... The only negative comments I have is that in this version you can't duplicate lines without exporting to a .json file and editing it manually and it's a little slow to have to keep hitting edit on each line if your changing 20+ lines (my 1st script had 800 lines lol).
Overall one of "The Best" extensions I've seen in some time :)