nimanima wrote:under browser -extension there is only one extension (which one I don't know since they don't install under their names), but I have about 15 or so. Where are the others stored?
Wasn't sure if you'd already found this (you've gotten "as far as the xpi installation file"), but...
The .xpi files live in the 'extensions' folder in your profile:
C:\Users\{yourusername}\AppData\Roaming\Moonchild Productions\Pale Moon\Profiles\********.default\extensions
Quickest way to get there is via Pale Moon's Troubleshooting page (about:support): Help -> Troubleshooting Information
Click the 'Show Folder' button to open your profile folder.
That same Troubleshooting page lists all the extensions you've installed, including IDs (which correspond to the file names in the 'extensions' folder) -- So use this list to identify the files.
(The one "extension" that you found in your PM installation directory, BTW, is actually the browser's default theme.)