Solid extension; one should never leave the homepage without it.

Granted, it can sometimes be a hassle to find the right scripts to turn on to get a website to function. Once they are found, though, it feels like said site has the potential to be hundreds of times safer and more convenient to explore with other needless (or even perhaps harmful) scripts turned off.

Though I should mention... as of late, McAfee Site Advisor appears to have been discontinued recently and is no longer working, so you might want to find a replacement for that link.