NewTabURL
This extension allows users to select the default URL when new tabs are opened.
The options are:
- A blank page.
- The home page.
- The current page.
- A user defined URL.
When there is an URL in the clipboard, it is also possible to open that URL in the new tab.
Localizations: ca-AD (Sogame), cs-CZ (PetrTwo), da-DK (AlleyKat), de-DE (Starke), en-US (Sogame), es-ES (Sogame), fi-FI (Risse), fr-FR (Okaryn), hr-HR (Krcko), hu-HU (Cashman), it-IT (Underpass), ja-JP (Kippis), nl-NL (David Hoepelman), pl-PL (manieKMP), pt-BR (Rodrigo Bergmann Laurindo), ru-RU (Leonid M Postovski), sv-SE (Patrik Johansson), sk-SK (atom), zh-CN (fiag), zh-TW (kennith).
Works with: 
Firefox 1.5 - 3.0.* 
Flock 0.5 - 1.0
Awards
