I need to run some old browser-based java applications. But when today I open my Firefox and try to open this app, I found that Java plugin not works. I searched Internet and find that new Firefox not longer supports Java plugin (Chrome and other browsers too). So how can I make this in-browser java application run? I use Ubuntu 16.04 64-bit.

  • Some browser-based Java applications may be possible to launch using appletviewer – Thorbjørn Ravn Andersen Apr 4 at 8:38
up vote 3 down vote accepted

| Ubuntu 16.04 LTS 64-bit |

  • First, I have updated Java to have the latest version.

    sudo add-apt-repository ppa:webupd8team/java
    sudo apt-get update
    sudo apt-get install oracle-java8-installer
  • Then I download and unpack archive with 64-bit ESR Firefox (older version - v.45) from here

  • Then I close my 'standard' previously installed Firefox and run 'firefox' file from the extracted folder of the version 45 archive.

And after that I open my site and successfully run Java application from it.

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