BTW, try google chrome, its speedy devil ...
Do this ....
1. Open Firefox, Toolbar go to Bookmarks/Organize Bookmarks.
2. Expand Import and Backup and select Export HTML.
3. Then export your Firefox bookmark collection to a desktop location.
4. Open Internet Explorer 9 and hit Alt+T to bring up the Toolbar. Then click File / Import and export.
5. In the Import/Export Settings select Import from a file. Notice there is Import from another browser.
6. Now browse to the location where you saved the exported Firefox bookmarks previously.
7. Select the destination and click Import.