Click on menu 'File'>>'Import' and select browser or file to import bookmarks. If portable bookmarks is not use then the item corresponding to bookmarks will disabled. How to set path to the portable bookmarks you can see here.
Also you can drag a bookmarks file or folders from Explorer to program list. Note: You can import bookmarks into a program list (LinkCollector tab) only.
Active/current browser tab/page
1. To grab link from current browser page you can use a shortcut (default is CTRL + SHIFT + Q). How to change shortcut you can see here... The captured link will be stored into a special list. To view this list click on menu item 'Tools'>>'Captured from browser'.
2.
You can drag and drop the link from webpage to a program list (not work in Opera).
Clipboard
To enable function to grab url from clipboard you need to enable a option.
To view list of bookmarks grabbed from clipboard, click on menu item 'Tools'>>'Clipboard'