I strongly recommend the following download, the latest version of the Opera browser. The office is split over whether Firefox or Opera is better. I'm in the Opera camp, although I use both.

Opera 9.6 has been improved to show web pages even faster along with a collection of other bits and pieces.

  The email client in Opera is often forgotten, which is a shame because it is very powerful. Firstly it gives emails tags rather than putting them in folders. I prefer tags to folders because an email can be given several tags but only put into one folder.

Opera 9.6 has a new low bandwidth mode which should improve the download speed when on a slow connection. I'm guessing this is a similar technology to the mobile version of Opera, Opera Mini. The web pages or emails are sent to the computer via an Opera server that compresses them.

Opera Link has been improved. This is a synchronisation service that now shares bookmarks, SpeedDial settings, notes and even the browser history between different Opera installations using a My Opera account.

Opera is also worth trying just for mouse gestures, which are included by default (Firefox can do this with an addon)