Firefox XPCOM extension not working after installation (C++)

Question

I have implemented a protocol handler extension in C++ using Gecko SDK. When the dll is copied to C:\Program Files (x86)\Mozilla Firefox\components every thing works perfectly. But when the the same dll is used to create .xpi installation file, the extension gets installed; but the custom protocol did not work.

I have the following structure in the xpi file

chrome.manifest
components
components/abc.dll
install.rdf

I do not have the IDL file. Is IDL file required in xpi?

Answer 1

Fixed!

Was missing <em:unpack>true</em:unpack> in install.rdf

Should have included install.rdf in the question :)