Google Map URLs Get Converted to Masses of Text Code That Lead to a Blank Untitled Webpage

[vagabond6]

For some reason, when I edit URLs by replacing one long Google Maps
URL with another in a Snip shortcut under Manage Snips, it gets
converted to masses of text code beginning with http://www.google.com/m/directions...
If someone uses the Snip shortcut, it opens a blank untitled page in
their browser and shows the actual shortcut address in the address
bar. That occurs even when I go to Manage Snips and click on the
particular Snip shortcut.

I use the latest version of Firefox for Windows (v3.6.8).