Bit more info for the browser's scrollbar:

- enter about:config in the address field
- in 'Name', type layout.scrollbar.side
- in 'Value', type 3
- hit the enter button of your nokia
- click on the 'Set preferences' button on the browser page

voila

(thank you fiferboy at the #maemo channel & HowieG at this thread:
http://talk.maemo.org/showthread.php?t=21905 )