I have been a fan of RSS for some time now so the building of RSS reading (using live bookmarks) right into Firefox is ideal for me.
I love the smart search in Firefox – i.e. typing “dict rss” into the address bar brings up definitions of rss from dictionary.com and the same for any other terms you type in in the format “dict” (without the inverted commas).
The ability to customise Firefox by adding themes or extensions only serves to further enhance its appeal – think Firefox is lacking in some functionality? Check out the Extensions and the chances are some developer with a like mind has developed an extension to cover this!
While the Themes allow you to change the look and feel of your favourite browser at will.