Translated:
"ANDREAS PROSCHOFSKY
March 8, 2017, 14:12
105 POSTINGS
Only an exception is made for Flash - end for Silverlight, Java and Co. - Web Assembly support new
Once, browser plugins were a popular tool for providing cross-platform capabilities for the web. However, the technology has long since received a less pleasing reputation - as a safety hazard. Accordingly, more and more manufacturers have finally adopted such solutions, now Mozilla is the turn.
Derogation
With Firefox 52, Mozilla largely removes the support for NPAPI plugins. With one exception, the Flash plugin may continue to run here, as there are still many websites that use the Adobe software. All other plugins, especially Java and Silverlight, run now, however, no longer in the Firefox.
Web Assemblies
For the future of the web, however, the new version also has a major innovation to offer: Firefox 52 is the first version that supports WebAssembly. The new runtime environment is supposed to run code much faster than Javascript, but still work browser-wide. The development is also done together with other browser providers like Google or MIcrosoft, and is based on previous technologies such as asm.js or Native Client.
In addition, the Firefox 52 brings additional security improvements. Thus the warning introduced with the previous version is now clearly more offensive against unsafe login windows. And the Mozilla browser now supports the Strict Secure cookies, which should prevent unsafe web pages from creating a cookie that has already been stored with the "secure" attribute.
Download
Further information about Firefox 52 can be found in the official release notes . The new version is available for Windows, Linux and macOS for download, existing installations are updated automatically. (Apo, 8.3.2017)"
think it is cause firefox 52 removes all plugins
http://derstandard.at/2000053807014/Firefox-52-wirft-fast-alle-Plugins-raus