On my computer, the script is located in the following folder:
C:\Users\Dan\AppData\Roaming\Mozilla\Firefox\Profiles\y13lb10n.default\gm_scripts\fr_tree_viewer
That's Win7 (and probably Vista configuration). On XP, it might be in C:\Documents and Settings\Username\Application Data\Mozilla\ etc....
Anybody doing this with Linux...Ubuntu or otherwise?
Thank you. I got it to work. Now I’m working on getting it to work on Chrome.