The latest version of Firefox 11.0 allows you to migrate all your Bookmarks, Browsing History and Cookies from Google Chrome.
1.Just click the Bookmarks button 
on the right side of the navigation toolbar ( If you are using Windows XP: click the Bookmarks menu) and select "Show all Bookmarks", Library window will open as shown below, click Import Data from Another Browser from Import and Backup menu.
2.Firefox will show you Import Wizard window, select Chrome, then click Next button.
3.Select the items you want to import and click next.
4.Click Finish.
You can find all imported Bookmarks in a folder named From Google Chorme in the Firefox Bookmarks Toolbar.
Note: If you are using Private Browsing mode turn off it and try again. Because Firefox won't allow importing in Private Browsing mode.
on the right side of the navigation toolbar ( If you are using Windows XP: click the Bookmarks menu) and select "Show all Bookmarks", Library window will open as shown below, click Import Data from Another Browser from Import and Backup menu.2.Firefox will show you Import Wizard window, select Chrome, then click Next button.
3.Select the items you want to import and click next.
4.Click Finish.
You can find all imported Bookmarks in a folder named From Google Chorme in the Firefox Bookmarks Toolbar.
