If you are using Google Reader (post about Google Reader in Hebrew) as an RSS reader and Firefox as you browser, you should try Better GReader add-on for Firefox.

The add-on adds the following functionalities to Google Reader:
- Preview web pages inline in Google Reader
- Collapse the header and sidebar for more reading area
- Add favicons to feed subscriptions
- And a few more features like skins, hiding unread count and more...

Customization options for Google Reader

Skins for Google Reader