There is an Addon for Firefox that I really like called Session Manager.  All it does is add the option to restore all of the tabs you have open when you close Firefox.  I like this because I could just leave up all of the pages I go to frequently, and there they were the next time I opened the browser without having to bookmark everything.

Google Chrome does this by default with no extra addons.  Simply click on the Wrench in the top right and select Options.  On the Basics tab, the top section called On Startup is what controls how Chrome acts when it’s opened.

The option you’re looking for is called Restore the pages that were open last.

Related posts:

1. How to Remove the Google Background Image
2. How to Erase Your Browser History