Just want to let you guys know that I've submitted a bug for this addon. If you refresh the file associations within this addon it sets the following two keys
HKEY_CURRENT_USER\Software\Classes\FirefoxMAFF\shell\open\command
HKEY_CURRENT_USER\Software\Classes\FirefoxMHTML\shell\open\command
HKEY_CURRENT_USER\Software\Classes\FirefoxMAFF\DefaultIcon
HKEY_CURRENT_USER\Software\Classes\FirefoxMHTML\\DefaultIcon
to direct to seamonkey.exe rather than palemoon.exe
Launch Regedit and navigate to the above keys and modify the command and simply substitute the word seamonkey with palemoon to fix.
In my particular case
HKEY_CURRENT_USER\Software\Classes\FirefoxMAFF\shell\open\command now states
"C:\Program Files (x86)\Pale Moon\palemoon.exe" -osint -url "%1" rather than
"C:\Program Files (x86)\Pale Moon\seamonkey.exe" -osint -url "%1"
Mozilla Archive Format incorrect association
Moderators: FranklinDM, Lootyhoof