Importing favorites from Internet Explorer

The problem is that at installing Firefox, my favorites etc. from Internet Explorer are not imported.

The reason may be that at first, I installed Firefox on my harddisk, just to try it. Then, the favorites were installed. Then I removed Firefox from my harddisk, and later installed Firefox on my USB stick. The favorites were not installed. Neither were they installed after removing Firefox and reinstalling the program on my USB stick.

Is there any method to import the favorites after having installed Firefox?

Hans Olav Fekjær
Norwegian psychiatrist