Using WebKit 1.1.16 release, built from source on Ubuntu 9.10 I have the Adobe Reader 9.1 installed. It has added nppdf.so to directory ~/.mozilla/plugins, and if I set PATH to point at the directory with the acroread executable then the plug-in works when navigating to a .pdf in Firefox. However, navigating to a .pdf in WebKit's GtkLauncher example app just writes "DEBUG: NP_Initialize, DEBUG: NP_Initialize succeeded" to stdout a few times but does not show the document. The same thing happens in my app that's embedding WebKit/GTK.
I don't think WebKitGTK supports NPAPI plugins anymore which is what Adobe Reader 9.1 used so this can be closed.
(In reply to Lionir from comment #1) > I don't think WebKitGTK supports NPAPI plugins anymore which is what Adobe > Reader 9.1 used so this can be closed. That is right, the NPAPI support is no more in trunk. Let's close this. (And thanks for the heads up!)