If you visit any site regularly and don't want to type it again and again. Then in Firefox you will get the most visits sites as thumbnails and you recent bookmarked pages as a list on the right side of your Firefox window. You just need to download latest Google Toolbar. It it similar feature from Google's Chrome.
You don't like the new feature of the Firefox, you can disable it easily from following steps:
- Open Firefox window
- Right click the Google logo in the Google toolbar
- Click on Options
- And just Untick the 'Enable the Google new tab page' box