Register NPAPI Plugins

Question

i try to register an own NPAPI Plugin, but i dont found informations about that.

I know that the NPAPI on Chrome is deprecated (i will write a PPAPI Plugin later) but Chrome-Docs says that i must use a manifest.json (See https://developer.chrome.com/extensions/npapi). But how i register it?

Following i had try:

Over an BATCH-File (register.bat):

 regsvr32.exe /s "C:\Users\Bizzi\Desktop\WoRPG Plugin\npworpg\Release\npworpg.dll"
 pause

Directly in the Registry:

HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins\
    [worpg.de/WoRPG]
        Description  REG_SZ   World of RPG Browser Plugin
        Path         REG_SZ   C:\Users\Bizzi\Desktop\WoRPG Plugin\npworpg\Release\npworpg.dll
        ProductName  REG_SZ   World of RPG Plug-In
        Vendor       REG_SZ   World of RPG
        Version      REG_SZ   1.0.0

        [MimeTypes]
            [application/x-worpg-launcher]
                Description  REG_SZ   World of RPG

Answer 1

The solution is very simple!

Be sure what the depency the browser have. If the browser an 64bit based browser, be sure that the registry entry is set:

Chrome (32bit): KEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions

Chrome (64bit): KEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Google\Chrome\Extensions

Firefox (32bit): KEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins

Firefox (64bit): KEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins

Here is a little .reg script:

Windows Registry Editor Version 5.00

; MOZILLA 32bit
[HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins\@worpg.de/npworpg,version=1.0.0]
"Description"="World of RPG Browser Plugin"
"Path"="C:\\Program Files (x86)\\World of RPG\\plugins\\npworpg.dll"
"ProductName"="npworpg"
"Vendor"="World of RPG"
"Version"="1.0.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins\@worpg.de/WoRPG,version=1.0.0\MimeTypes]

[HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins\@worpg.de/WoRPG,version=1.0.0\MimeTypes\application/x-worpg-launcher]
"Description"="World of RPG"

; MOZILLA 64bit
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@worpg.de/npworpg,version=1.0.0]
"Description"="World of RPG Browser Plugin"
"Path"="C:\\Program Files (x86)\\World of RPG\\plugins\\npworpg.dll"
"ProductName"="npworpg"
"Vendor"="World of RPG"
"Version"="1.0.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@worpg.de/WoRPG,version=1.0.0\MimeTypes]

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MozillaPlugins\@worpg.de/WoRPG,version=1.0.0\MimeTypes\application/x-worpg-launcher]
"Description"="World of RPG"

; CHROME 32bit
[HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\ckpknilfoflolaglllnonhhhnfhaidom]
"Path"="C:\\Program Files (x86)\\World of RPG\\plugins\\npworpg.dll"
"Version"="1.0.0"

; CHROME 64bit
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Google\Chrome\Extensions\ckpknilfoflolaglllnonhhhnfhaidom]
"Path"="C:\\Program Files (x86)\\World of RPG\\plugins\\npworpg.dll"
"Version"="1.0.0"

Answer 2

You are relatively close, from the looks of things. The documentation shows that you have incorrectly formed your plugin identifier, however, which should start with a @.

Hard to be 100% sure if that's the only issue, but it's the one I see.

KEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins\
[@worpg.de/WoRPG]

Try that, see what happens.