Want to create a Firefox or Thunderbird icon for all your system users and future users that functions like a system icon (no shortcut arrow and a custom right-click menu):
Firefox:
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}]
@="Mozilla Firefox"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\DefaultIcon]
@="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\",0"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell]
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\open]
@="&Open"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\open\Command]
@="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\""
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\open (safe-mode)]
@="Open (&Safe Mode)"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\open (safe-mode)\Command]
@="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\" -safe-mode"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\options]
@="Op&tions"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\options\Command]
@="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\" -chrome \"chrome://browser/content/pref/pref.xul\""
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\profilemanager]
@="&Profile Manager"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\Shell\profilemanager\Command]
@="\"C:\\Program Files\\Mozilla Firefox\\firefox.exe\" -ProfileManager"
[HKEY_CLASSES_ROOT\CLSID\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}\ShellFolder]
"Attributes"=hex:18,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{EC8030F7-C20A-464F-9B0E-13A3A9E97384}]
@="Mozilla Firefox"
Thunderbird:
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}]
@="Mozilla Thunderbird"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\DefaultIcon]
@="\"C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe\",0"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell]
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\open]
@="&Open"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\open\Command]
@="\"C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe\""
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\open (safe-mode)]
@="Open (&Safe Mode)"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\open (safe-mode)\Command]
@="\"C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe\" -safe-mode"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\options]
@="Op&tions"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\options\Command]
@="\"C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe\" -options"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\profilemanager]
@="&Profile Manager"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\Shell\profilemanager\Command]
@="\"C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe\" -ProfileManager"
[HKEY_CLASSES_ROOT\CLSID\{3550F703-E582-4d05-9A08-453D09BDFDC6}\ShellFolder]
"Attributes"=hex:30,00,00,00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace\{3550F703-E582-4d05-9A08-453D09BDFDC6}]
@="Mozilla Thunderbird"
nice! ;D this will be of aton of help :)