Whether you are using Opera or the Mozilla MicroB browser on your N800, you are probably going to want to change the home page to something more convenient than the default. Follow these steps to change the home page address and disable the default home page:
1. Open your web browser by tapping on the icon in the task navigator.
2. Tap
Web.
3. Tap
Tools and then
Settings.
4. Select the
Connection tab.
5. Input the URL of the desired page into the
Home page address textbox. Uncheck the
Use default home page checkbox.
6. Tap the OK button.
Source:
Nokia N800: Change the Web Browser Home Page - Tech-Recipes.com