What do I need to do to avoid the "Manual Install" in Firefox for a Plugin and where do I have to go or what do I have to do to avoid the (Author not verified) message when downloading a Plugin. Ideally I would like to initiate the installation of the Plugin automatically and if I need to sign the Plugin somehow to show that it is not doing any kind of malicious things I would like to do that as well.
Thanks!
Here is the official tutorial, which only deals with signing the XPI. I don't believe it's possible to install the plug in automatically for rather obvious security reasons.
Here is the official tutorial which deals with signing the XPI. Automatic installation isn't possible because of the security considerations.
Signing the XPI will remove the warning message but there is still no automatic way to install extensions or plugins.
I've written a few posts on the XPI Format and a howto for signing using a java commandline tool.
The tool XPISigner simplifies the process considerably and is integratable into build systems.