Hello,
I dont quite follow. You are importing into Safari, correct?
If so, you select import bookmarks. A standard file location/selection dialog box appears and you need to navigate to the place where you (yes, you) EXPORTED the bookmarks from whatever - maybe Firefox, maybe another version of Safari. It must be saved in HTML format. Select it, and import.
Then go to Bookmarks --> show all bookmarks. They should be in a folder on the left with a title like "imported today".
Does this answer your question? It was pretty vague...a word or words seemed to be missing, maybe from editing.
Grant