content fdm_ffext chrome/content/

overlay chrome://browser/content/browser.xul chrome://fdm_ffext/content/fdm_ffext.xul
overlay	chrome://mozapps/content/downloads/unknownContentType.xul chrome://fdm_ffext/content/fdm_ffextDM.xul

interfaces components/ivmsfdmff30.xpt appversion<39
binary-component components/vmsfdmff30.dll appversion<39

interfaces components/ivmsfdmff39.xpt appversion>=39
binary-component components/vmsfdmff39.dll appversion>=39
