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Java software for your computer, or the Java Runtime Environment, is also referred to as the Java Runtime, Runtime Environment, Runtime, JRE, Java Virtual Machine, Virtual Machine, Java VM, JVM, VM, Java plug-in, Java plugin, Java add-on or Java download. Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today! When you download and install the free Java software, you are installing the Java Runtime Environment (JRE), including the Java Virtual Machine (JVM). When referring to “Java” in this article, we are referring to JRE, a web browser plug-in required to load Java content in Firefox. Following are steps to Download & Install Java on Windows and these steps also remain the same for any platform other than windows. Steps to Download Java Development Kit (JDK) To install Java, you first need to download the installer program from Oracle. You can use Java in Firefox ESR to display content that is unsupported in the latest Firefox release. Firefox ESR will allow you to view Silverlight and Acrobat content too. Thank you for visiting Tech Help Knowledgebase to learn how to use Java in Firefox.
I am trying to install Java and plugins for Firefox. I installed both the JDK and JRE.
When I try with the sudo update-alternatives --config java command it shows only one choice available.
Plugins are not usable in Firefox.
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6 Answers
If you are using a version after 52 (not ESR), which disabled NPAPI, you are out of luck. If you are using one prior, which you absolutely wouldn't want to, you can install the OpenJDK JRE, which would allow you to execute Java binaries locally using the java binary. This however, isn't enough to execute Java web applets on your browser, which can be accomplished by installing the Icedtea plugin:
Then go to about:addons, in the plugin section, check if the plugin is enabled. Mozilla disables insecure plugins by default, that means that Java is disable even after installation due security concerns. You need to activate it before using it.
Installing the IcedTea Java plugin:
To install the IcedTea Java plug-in, open a terminal and type:
Install the Firefox plug-in - Oracle
In a terminal:
Remove the IcedTea plugin, if it has been installed.
Remove a former version of the Java plugin (may or may not be present)
Now you can install the plugin, by creating a symbolic link (you tell Firefox where the plugin is located). For 32-bit Java, use
For 64-bit Java use
Confirm that the JRE has been successful by using the official Oracle website.
Source: Java installation
Beginning in Firefox version 52, support for NPAPI plugins (java applets) in Firefox has ended, due to performance and security issues, the way that I manage to run java applets is to install the Extended Support Release (ESR) of firefox.
download here:https://www.mozilla.org/en-US/firefox/organizations/all/
more details here:https://support.mozilla.org/en-US/kb/npapi-plugins
If you just downloaded and installed java jdk from oracle, then, let's say you have installed jdk-8u91-linux-x64.tar.gz on
/my/java/directory/
Then you'll have a directory like:
/my/java/directory/jdk1.8.0_91/
All you have to do is go to your ubuntu firefox plugins directory and create a link:
This is an old thread, but I stumbled upon it while googling a solution to my problem today. I figured someone else might be in the same situation.
I need in-browser Java for legacy work-related websites, and the oracle java plugin does not cut it. After a long trial-and-error approach, I got IcedTea working consistently in an older version of firefox like this:
- Download a tar of Firefox, version 51 (newer version don't support the plugin)
- Install the OpenJDK (7 or 8)
- Install the icedtea--plugin and the icedtea-plugin
- Now your openJDK installation will contain a IcedTeaPlugin.so file in the jre/lib folder
- copy this to the mozilla/firefox plugin folders (I couldn't figure out which one to copy it too, so I just copied it to anything firefox/plugins or mozilla/plugins)
- start your old firefox version
- verify the plugin is active (check about:plugins)
One of my colleagues created a script to remove the old firefox, and untar it on every run. That way it never gets updated accidentally. Be sure not to do this with your main firefox application.
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I hope this helps you.
Install Java Plugin Firefox Linux
Its been a battle, especially since I went through this a couple of months ago with 14.04, forgot the solution, upgraded to 16.04...
It is different I had Iced-tea and Oracle working under firefox in 14.04. I actually prefer Oracle (not generally but my use almost requires it) so I only have that now. I did not attempt any multiple installs or repositories. Symlinks as per most of the instructions out there are no good either.
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In the end, in Firefox went to Edit--> Preference-->Applications then scrolled down to the JNLP file extension and picked 'Use other..' from the drop down menu. Then found javaws from the relevant directory.
It is only a workaround, and Im not sure if it will suit your needs. Keep in mind most plugins will be deaded by March.
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How do I download and install Java online for Firefox on Windows?
Firefox Java Support
This article applies to:- Platform(s): Windows 2008 Server, Windows 7, Windows 8, Windows XP, Windows Server 2012, Windows Vista, Windows 10
- Browser(s) Firefox
- Java version(s): 7.0, 8.0
Note: Installing Java requires that you can gain administrator access to Windows on your computer.
Download and InstallIt is recommended, before you proceed with online installation you may want to disable your Internet firewall. In some cases the default firewall settings are set to reject all automatic or online installations such as the Java online installation. If the firewall is not configured appropriately it may stall the download/install operation of Java under certain conditions. Refer to your specific Internet firewall manual for instructions on how to disable your Internet Firewall.
- Go to Java.com and click on the Free Java Download button
- On the Firefox download page click on the Agree and Start Free Download button
- The File Download dialog box appears, click on the Save File button
- Double click on the downloaded file in the Download Manager window or where you normally save download files.
Note: Depending on your security settings, you may be presented with dialogs asking for permission to continue. Confirm you want to proceed with the installation.
- The installation process starts. Click the Install button to accept the license terms and to continue with the installation.
- Oracle has partnered with companies that offer various products. The installer may present you with option to install these programs when you install Java. After ensuring that the desired programs are selected, click the Next button to continue the installation.
- A few brief dialogs confirm the last steps of the installation process; click Close on the last dialog. This will complete Java installation process.
Detect older versions (8u20 and later versions). Starting with Java 8 Update 20 (8u20), on Windows systems, the Java Uninstall Tool is integrated with the installer to provide an option to remove older versions of Java from the system. The change is applicable to 32 bit and 64 bit Windows platforms.
Install Java For Firefox Free Online
Notifications about disabled Java and restoring prompts
Java And Firefox Browser
The installer notifies you if Java content is disabled in web browsers, and provides instructions for enabling it. If you previously chose to hide some of the security prompts for applets and Java Web Start applications, the installer provides an option for restoring the prompts. The installer may ask you to reboot your computer if you chose not to restart an internet browser when it prompted you to do so.
Test InstallationTo test that Java is installed and working properly on your computer, run this test applet.
NOTE: You may need to restart (close and re-open) your browser to enable the Java installation in your browser.
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