Windows Firefox does not find my plugin

[Rudi Sherry]

I'm building a skeleton NPAPI plugin to test specific functionality and I cannot get Firefox to see it. I'm on a 64-bit Windows 7 machine.

I have added:

HKLM\SOFTWARE\Wow6432Node\MozillaPlugins\PluginBug
(Default) REG_SZ (value not set)
Description REG_SZ "Test"
Path REG_SZ <path-to-my-plugin>\npPluginBug.dll
ProductName REG_SZ PluginBug
Version REG_SZ 1.0.1
Vendor REG_SZ Me
HKLM\SOFTWARE\Wow6432Node\MozillaPlugins\PluginBug\MimeTypes\application/vnd.pluginbug

... it doesn't appear in Add-ons Manager, nor in "about:plugins".

Using Process Monitor, I compared how firefox looked for all plugins; for each plugin (including mine) firefox queried the directory containing it to get a directory listing. For each (including mine), the listing included the plugin.

But for each of the others, after the QueryDirectory finished, firefox called "CreateFile" with Open/Read... but for mine, after the QueryDirectory finished, it called "QueryOpen" (result SUCCESS).

Why this difference?

I've verified with CFF Explorer that I'm exporting NP_Initialize, NP_GetEntryPoints and NP_Shutdown.

AFAIK nothing else has my plugin open.

I deleted pluginreg.dat and tried again, with no success.

I restarted... same.

First, assuming I spelled everything correctly, is there something I missed? I'm typing this in manually so might have fat-fingered something in this email.

Thanks,
Rudi

[Benjamin Smedberg]

On 9/17/2012 3:47 PM, Rudi Sherry wrote:
> I'm building a skeleton NPAPI plugin to test specific functionality and I cannot get Firefox to see it. I'm on a 64-bit Windows 7 machine.
>
> I have added:
>
> HKLM\SOFTWARE\Wow6432Node\MozillaPlugins\PluginBug
> (Default) REG_SZ (value not set)
> Description REG_SZ "Test"
> Path REG_SZ <path-to-my-plugin>\npPluginBug.dll
> ProductName REG_SZ PluginBug
> Version REG_SZ 1.0.1
> Vendor REG_SZ Me
> HKLM\SOFTWARE\Wow6432Node\MozillaPlugins\PluginBug\MimeTypes\application/vnd.pluginbug

I suspect that there is nothing wrong with the registry entries. What's
more interesting to Firefox is the data built into the resource entries
of the DLL. Specifically I noticed that when I was making my own
testplugin version that I needed the resource to be in a specific
language/codepage:

https://github.com/bsmedberg/blue-fishmonger-testplugin/blob/master/bsmedberg-testplugin/testplugin.rc

VALUE "Translation", 0x409, 1252

was necessary, and the default provided by the Visual Studio wizard was '1200' not '1252'.

--BDS

[Rudi Sherry]

Thanks! That was it, that was not obvious to me ;)