A .webloc file is a shortcut or bookmark that is created when Apple users send each other bookmarks. (Don't blame them, Apple users don't know any better.)
All you have to do:
- save the file
- If you can see that the file name ends in .webloc:
- just change the .webloc to .txt
- open it
- If you can't see the file extension (.webloc):
- right-click the file
- Open With
- Notepad (you might have to select "Choose Program..." first).
Copy the stuff that's in between <string> and </string>, and paste it into the address bar of your web browser.
FYI: A .webloc file just a simple text file formatted in XML (if you don't know what that means, don't worry about it).