Edit the content of a text resource in the Content field, for example a CSS or HTML file.
Click Choose File to upload a new resource, for example a GIF image file.
Click Save to update the changes.
Click Restore to undo any new changes.
To add a new fav icon file:
Select Forms > Form Spaces.
Locate a form space and click Edit.
Select the Resources tab.
Click New and upload a file. Give it a different file name from the standard one as browsers cache these things very aggressively, and they are hard to clear out. Make sure it is in the correct format.
Edit the Space Page “Border Template” and set the path to the new fav icon image.