Now I know why I can not run...
Posted: 20 Jun 2019, 09:28
https://java.com/en/download/windows-64bit.jsp
We have detected you are using the 64-bit version of Firefox which
will not run the Java plugin from this browser. More info
https://java.com/en/download/faq/firefox_java.xml
Firefox no longer provides NPAPI support (technology required
for Java applets)
As of September, 2018, Firefox no longer offers a version which
supports NPAPI, the technology required to run Java applets. The
Java Plugin for web browsers relies on the cross-platform plugin
architecture NPAPI, which had been supported by all major web
browsers for over a decade. The 64 bit version of Firefox has
never supported NPAPI, and Firefox version 52ESR is the last
release to support the technology. It is below the security
baseline, and no longer supported.
We have detected you are using the 64-bit version of Firefox which
will not run the Java plugin from this browser. More info
https://java.com/en/download/faq/firefox_java.xml
Firefox no longer provides NPAPI support (technology required
for Java applets)
As of September, 2018, Firefox no longer offers a version which
supports NPAPI, the technology required to run Java applets. The
Java Plugin for web browsers relies on the cross-platform plugin
architecture NPAPI, which had been supported by all major web
browsers for over a decade. The 64 bit version of Firefox has
never supported NPAPI, and Firefox version 52ESR is the last
release to support the technology. It is below the security
baseline, and no longer supported.