http://kb.mozillazine.org/Import_bookmarks#From_Safari

I get no menu item labelled 'Import Bookmarks.'

Read this article.

https://support.mozilla.com/en-US/kb/Importing%20bookmarks%20and%20other%20data%20from%20Safari

As I said, in Firefox 8 there is NO drop down menu item for importing bookmarks under the File menu.

Exporting bookmarks from Safari

Go to File->Export Bookmarks. Safari saves your bookmarks in an HTML file. Save the HTML file to the Desktop or any other location of your choice.

Importing bookmarks to Firefox

Go to Bookmarks->Show all bookmarks. This will open up the Bookmarks Library.

Click Import and Backup...

Select Import Bookmarks from HTML.. from drop down menu.

Locate your HTML file exported from Safari.

You can use Safari Bookmark Exporter to export bookmarks to an HTML file,if exporting to the HTML file is not supported by Safari.

Download Link http://homepage.mac.com/simx/public/products/SBE1.1.dmg