To test your browser follow this link : https://www.java.com/en/download/installed8.jsp?detect=jre
About NPAPI : https://en.wikipedia.org/wiki/NPAPI
Direct download link for Firefox ESR : Windows 32Bit US 52.7.3 ESR Installer
Restart Firefox
Go to this page https://www.java.com/en/download/installed.jsp
Use the download link in the header on this page.
Download install restart windows
Link to releases : https://ftp.mozilla.org/pub/firefox/releases/
Firefox-ESR 52.7.3 (32-bit)
Oracle Java Version 8 Update 231
Tested 27.11.2019
IE Version 11.6481713 Update version (11.0.115)
You have the recommended Java installed (Version 8 Update 231).
IE 11 download page (not tested) https://www.microsoft.com/en-us/download/internet-explorer.aspx
HPE Lights-Out Standalone Remote Console for Windows 1.3.3 (28 Sep 2017) HPE ProLiant or Integrity server with iLO 3, iLO 4 or iLO 5. iLO 3 firmware v1.15 or later.
https://support.hpe.com/hpsc/swd/public/detail?swItemId=MTX_bc8e3ffa59904ec3b505d9964d
sudo add-apt-repository ppa:cding/firefox-esr-52
sudo apt-get update
sudo apt-get install firefox-esr
sudo apt-get install icedtea-plugin
firefox-esr
To remove again sudo add-apt-repository --remove ppa:cding/firefox-esr-52
Repository home https://launchpad.net/~cding/+archive/ubuntu/firefox-esr-52/+index?field.series_filter=cosmic
sudo add-apt-repository ppa:jonathonf/firefox-esr-52
sudo apt-get update
sudo apt-get install firefox-esr
sudo apt-get install icedtea-plugin
firefox-esr
Repository home https://launchpad.net/~jonathonf/+archive/ubuntu/firefox-esr-52