Importing bookmarks from Chrome is as easy as navigating through the menus. Once you go to the bookmarks menu in google chrome, there is an option there to be able to export your bookmarks.
After you export your html bookmark file from google chrome, go ahead and open Firefox.
With firefox open, press the ctrl + shift + B keys on your keyboard, and the Library Bookmark Manager will open in firefox.
Now you can import your google chrome bookmarks into firefox.