Two things I find myself doing oh so frequently when on the net:

1. 
   
2. Getting referred to wikipedia after googling
3. 
   
4. Checking word spellings and definitions with one of the online dictionaries
5. 
   

With the Firefox add-on Hyperwords, both these activities just got incredibly easier. Just select text in your browser and you have instant access to the related wikipedia entry, check the dictionary and more (stock quote lookups etc).

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!



Hat tip to blankanvas for putting me onto this..