- Getting referred to wikipedia after googling
- Checking word spellings and definitions with one of the online dictionaries
Even better, the results pop-up in the browser so you are not left with a cascade of windows or tabs to get lost in.
It joins firebug as one of the top two "must-have" add-ons for my Firefox install!
![](http://1.bp.blogspot.com/_AZh6c1pzK1A/Sht3Px7MjsI/AAAAAAAAAlI/eSQ4zLhH8uM/s400/hyperwords.jpg)
Hat tip to blankanvas for putting me onto this..