Setting up the Gecko SDK
gecko_sdk_path ?= $(home)/tmp/xr xpidl ?= $(gecko_sdk_path)/bin/xpidl cxx ?= c++ xpidlsrcs = \ interfacea.idl \ interfaceb.idl \ $(null) cppsrcs = \ sourcea.cpp \ sourceb.cpp \ $(null) cppflags += -fno-rtti \ -fno-exceptions \ -fshort-wchar \ -fpic \ $(null) # gcc only define which allows us to not have to #include mozilla-config...
...gecko_config_include = -include mozilla-config.h gecko_defines = -dmozilla_strict_api gecko_includes = -i$(gecko_sdk_path) \ -i$(gecko_sdk_path)/idl \ -i$(gecko_sdk_path)/include \ -i$(gecko_sdk_path)/xpcom/include \ -i$(gecko_sdk_path)/nspr/include \ -i$(gecko_sdk_path)/string/include \ -i$(gecko_sdk_path)/embedstring/include gecko_ldflags = -l$(gecko_sdk_path)/bin \ -l$(gecko_sdk_path)/lib \ -lxpcomglue_s \ -lnspr4 \ -lplds4 \ -lxul \ -shared \ $(null) %.h...

Finding window handles - Archive of obsolete content
comparing to the method above, by using this method, you don't have to compile your component with nsiwidget.h and other bunchs of h files that should not be exposed to outside, and could change every time firefox updates, all you need is nsibasewindow.idl(it's not in gecko_sdk, get this from the latest firefox source, or http://mxr.mozilla.org/mozilla/sourc...basewindow.idl), and use xpidl to compile it to .h file, although that's stll a unfrozen interface, but it should be a lot better.

Setting Up a Development Environment - Archive of obsolete content
you should also set up your environment so that xpidl.exe (or just xpidl on other systems) is in the default executable path, and also add a variable called gecko_sdk, that points to your sdk build: export gecko_sdk=/path/to/your/sdk our build system should pick it up from there.