To import bookmarks to Factr, you first need to export them from your browser as an HTML file. See how below.
Export your bookmarks from Firefox:
Click Bookmarks on the top of your menu bar followed by Show All Bookmarks.
Click the import and backup your bookmarks button, represented by an up arrow and down arrow.
Then click Export Bookmarks to HTML...
Choose a location to save the file, which is named bookmarks by default.
Click Save and close the window.