Tap here to go to the mobile version of the site.
Your Firefox is out of date and may contain a security risk! Upgrade Firefox

Support Forum

How can I tell if Java is installed/enabled in Firefox browser on my Linux system? I went to Oracle/Java test page and it cannot find Java installed.


I see that Javascript is enabled. Is javascript and java the same thing?

Chosen solution

To avoid confusion:

Note that you have the IcedTea-Web Plugin installed and that is different Java implementation than the Oracle (formerly Sun) Java plugin, so the Oracle may not detect this plugin.

Read this answer in context 2
Post a Reply

Additional System Details

Installed Plug-ins

  • The IcedTea-Web Plugin executes Java applets.
  • Shockwave Flash 11.2 r202
  • The Totem 3.0.1 plugin handles video and audio streams.
  • DivX Web Player version


  • Firefox 20.0
  • User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:20.0) Gecko/20100101 Firefox/20.0
  • Support URL: http://support.mozilla.org/1/firefox/20.0/Linux/en-US/


  • Global Menu Bar integration 3.9 (globalmenu@ubuntu.com)
  • Troubleshooter 1.1a (troubleshooter@mozilla.org)
  • Ubuntu Firefox Modifications 2.6 (ubufox@ubuntu.com)


  • incrementalGCEnabled: True


  • adapterDescription: NVIDIA Corporation -- GeForce 6100 nForce 405/PCI/SSE2/3DNOW!
  • adapterDeviceID: GeForce 6100 nForce 405/PCI/SSE2/3DNOW!
  • adapterDrivers:
  • adapterRAM:
  • adapterVendorID: NVIDIA Corporation
  • driverDate:
  • driverVersion: 2.1.2 NVIDIA 173.14.30
  • info: {u'AzureCanvasBackend': u'cairo', u'AzureFallbackCanvasBackend': u'none', u'AzureContentBackend': u'none'}
  • numAcceleratedWindows: 0
  • numAcceleratedWindowsMessage: [u'tryNewerDriver', u'NVIDIA 257.21']
  • numTotalWindows: 1
  • webglRendererMessage: [u'tryNewerDriver', u'NVIDIA 257.21']
  • windowLayerManagerType: Basic

Modified Preferences

  • browser.cache.disk.capacity: 358400
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
  • browser.cache.disk.smart_size_cached_value: 358400
  • browser.places.smartBookmarksVersion: 4
  • browser.startup.homepage_override.buildID: 20130329030856
  • browser.startup.homepage_override.mstone: 20.0
  • dom.mozApps.used: True
  • dom.w3c_touch_events.expose: False
  • extensions.lastAppVersion: 20.0
  • gfx.blacklist.suggested-driver-version: NVIDIA 257.21
  • network.cookie.prefsMigrated: True
  • places.database.lastMaintenance: 1383699784
  • places.history.expiration.transient_current_max_pages: 22949
  • plugin.disable_full_page_plugin_for_types: application/pdf
  • privacy.cpd.offlineApps: True
  • privacy.cpd.siteSettings: True
  • privacy.sanitize.migrateFx3Prefs: True
  • privacy.sanitize.timeSpan: 0
  • security.warn_viewing_mixed: False


  • User JS: No
  • Accessibility: No
gnittala 28 solutions 307 answers


Java and Javascript are not the same. While both are computer languages to develop programs in, Javascript has a more focused approach towards Internet sites, while Java has a wider reach.

You can follow the instructions in this article to install Java on Linux Use the Java plugin to view interactive content on websites. Also, please ensure you are running the latest version of Java by following the instructions below.

Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

Was this helpful to you? 7
  • Top 10 Contributor
  • Moderator
10738 solutions 96600 answers

Chosen Solution

To avoid confusion:

Note that you have the IcedTea-Web Plugin installed and that is different Java implementation than the Oracle (formerly Sun) Java plugin, so the Oracle may not detect this plugin.

Was this helpful to you? 2
  • Top 25 Contributor
528 solutions 5041 answers

SEE: http://www.java.com/en/download/help/linux_install.xml for installing in Linux

Was this helpful to you? 0

Question owner

Thanks for the reply it helps with my understanding. It brings up another question: How can I get Firefox to see the applet I want to execute? I am new to Java/JavaScript. I am working in Eclipse and do not see how I can get Firefox to see the path where the applet is sitting.

Was this helpful to you? 1
Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.