Bookmarks import https://support.mozilla.org/en-US/kb/import-bookmarks-html-file

Firefox does not have mail, do you mean Thunderbird ?

Please let us know if this solved your issue or if need further assistance.

If you want to import favorites from either Edge or IE - a piece of cake :

Click on the Bookmarks icon (next to the star) and at the bottom of the dropdown click on 'Show All Bookmarks' - that will take you to the Library. At the top you'll see 'Import and Backup' - when you click on that, you'll get a dropdown, at the bottom of which : 'Import Data from Another Browser'. There you check the browser of your choice - and that's all there is to it.

hmmm, guess i wasn't clear. I want to transfer my book marks from MSN to Firefox

mmoon5764 said

hmmm, guess i wasn't clear. I want to transfer my book marks from MSN to Firefox

You mentioned 'favorites' and 'address book' ....... In Firefox 'favorites' are called 'bookmarks' - Confusing, I know, but you'll get used to it. And importing them : piece of cake  !

In case you do want to import your address book, would you take a look at this thread and see if the chosen solution will work for you as well :

https://support.mozilla.org/en-US/questions/1111867