hi, the EME-free versions come with DRM-support disabled by default - some more information about how drm is handled within firefox is at https://hacks.mozilla.org/2014/05/reconciling-mozillas-mission-and-w3c-eme/ and yes, win64bit versions of firefox come with limited support for npapi-plugins, only flash and silverlight will run in those firefox 64bit versions. if you depend on java still, then please stick with regular firefox 32bit builds which will support those plugins still for the coming months... https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/