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I have java installed. When I run the "java -version" in terminal I get a expected response indicating that I have Jre1.8.0_66 installed but when I try to see if I have java by asking the oracle website it says it is unable to verify. I'm certain that the solution in simple but every simple solution for me has been quite a task. Thanks.

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3 Answers 3

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Don't you forget to enable it effectively in Firefox, because after 52 version, you need to create a value at about:config

  • Type about:configat address bar and accept risks :);
  • Create a new Boolean Preference value, by right-clicking on name title.
  • Type plugin.load_flash_onlyand set it false
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I've got Oracle's Java 8 JVM installed, and on my system, the Firefox plugin is available through the Debian Alternatives System (which has the added benefit of allowing you to switch between JVMs) at /etc/alternatives/mozilla-javaplugin.so.

If that file doesn't exist on your system, uninstall Oracle's JVM and reinstall it from the Web Upd8 PPA, then test whether the plugin works in Firefox.

If that file does exist, close Firefox, open a terminal, and run:

sudo mkdir -p /usr/lib/mozilla/plugins
sudo ln -s /etc/alternatives/mozilla-javaplugin.so /usr/lib/mozilla/plugins/libjavaplugin.so

Then test whether the plugin works in Firefox.

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Open the terminal(press ctrl + T). Become the root user:

sudo -s

Create a directory called plugins if you do not have one:

mkdir -p /usr/lib/mozilla/plugins

Go to Mozilla plugins directory before you make the symbolic link:

cd /usr/lib/mozilla/plugins

Create a symbolic link:

ln -s /usr/local/java/jre1.7.0/lib/amd64/libnpjp2.so

Restart your browser and you are good to go. Found it here

You may also want to look at the following: How to install the Java plugin for Firefox

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  • This helped but when I test for java on the Oracle website it now says there is an "error, an exception has occurred". At least it is doing something now though. Better than before.
    – Voyager
    Dec 11, 2015 at 5:14
  • Cool, I'm glad I could help somewhat :). Dec 15, 2015 at 11:46

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