Yeah, but sometimes I worry about security with Add-Ons.
(How do I know I’m not installing something malicious?!)
Since it seems that most people like JavaScript, there doesn’t seem to be much of a demand - and thus products - to turn off JavaScript.
Sometimes JS really annoys me!! Like last night I could not get to a website because the Ad was stuck in some countdown that kept resetting… (Article will display in 20… 19… 18 seconds…)
For 99% I’m not happy with extra toolbars, and never download them (extra browser space, security, spam, extra unwanted stuff, etc.), but this one is great!
The Webdeveloper Toolbar has lots of other things which can be toggled + lots of handy tools aboard. For me: invaluable.