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Add "Java is installed but the plugin is missing from the Add-ons Manager" section

  • 6 Replies
  • Last reply by AliceWyman
  1. AliceWyman 6243 posts

    Copied from the How to allow Java on trusted sites article discussion:
    /kb/how-to-enable-java-if-its-been-bl.../5171
    AliceWyman said

    .... I agree that the content included in http://kb.mozillazine.org/Java#If_the_Java_plugin_does_not_appear_in_the_Add-ons_Manager_even_though_Java_is_installed should be added to a SUMO KB article on Java issues but I think it belongs under the "Troubleshooting" section of the Use the Java plugin to view interactive content on websites article. We should also add a link to the Use the Java plugin to view interactive content on websites article in this article, probably in the Intro, for users who need more help with Java. I'll see if I can get to it when I have the time. You (or anyone else) could also try making the revision if you feel up to it.

    Here's the information that's in MozillaZine's Java article, including references. (It will need to be edited to remove references and links that are internal to MozillaZine's KB).

    If the Java plugin does not appear in the Add-ons Manager even though Java is installed

    If the Java plugin does not appear in the Add-ons Manager, even though Java is installed, first do the following before reinstalling Java or trying other solutions:

    <snip>

    Enabling and disabling Java from the Java Control Panel

    Applies to Windows or Mac OS X 10.7.3 and above

    Starting in Java 7, the Java Control Panel includes the Security option, "Enable Java content in the browser", which is selected by default. De-selecting this option will prevent Java applets from running in any browser and the Java plugin will no longer appear in the Firefox or SeaMonkey Add-ons Manager or [[about:plugins]] list. To view or change this option, click the Java icon in the Windows Control Panel or Mac OS X System Preferences to open the Java Control Panel, then select the Security tab. See this Java Help page for details. http://www.oracle.com/technetwork/jav.../7u10-relnotes-1880995.html http://docs.oracle.com/javase/7/docs/.../jcp.html#security http://www.java.com/en/download/help/jcp_security.xml

    Copied from the [[How to enable Java if it's been blocked]] article discussion:<br> [/kb/how-to-enable-java-if-its-been-blocked/discuss/5171] <br> ''AliceWyman said'' <blockquote> .... I agree that the content included in http://kb.mozillazine.org/Java#If_the_Java_plugin_does_not_appear_in_the_Add-ons_Manager_even_though_Java_is_installed should be added to a SUMO KB article on Java issues but I think it belongs under the "Troubleshooting" section of the [[Use the Java plugin to view interactive content on websites]] article. We should also add a link to the [[Use the Java plugin to view interactive content on websites]] article in this article, probably in the Intro, for users who need more help with Java. I'll see if I can get to it when I have the time. You (or anyone else) could also try making the revision if you feel up to it. </blockquote> Here's the information that's in MozillaZine's Java article, including references. (It will need to be edited to remove references and links that are internal to MozillaZine's KB). ===If the Java plugin does not appear in the Add-ons Manager even though Java is installed=== If the Java plugin does not appear in the Add-ons Manager, even though Java is installed, first do the following before reinstalling Java or trying other solutions: *Open the [[Profile folder - Firefox |Firefox profile folder]] or the [[Profile folder - SeaMonkey |SeaMonkey profile folder]], then [[kill application|completely close]] Firefox or SeaMonkey and delete (or rename) the "pluginreg.dat" file. A new pluginreg.dat file will be generated when you restart the browser. Any plugins you may have disabled in the Firefox or SeaMonkey Add-ons Manager will be re-enabled. [https://support.mozilla.org/en-US/questions/944191?page=5#answer-397074] *'''On Windows or Mac OS''' (OS X 10.7.3 and above), If Java 7 is installed, make sure that "Enable Java content in the browser" is selected in the Java Control Panel's Security tab ([[#Enabling and disabling Java from the Java Control Panel|see below]]). *'''On Mac OS''' (OS X 10.7.3 and above) the Java 7 plugin will only run in 64-bit browsers so confirm that you aren't running Firefox or SeaMonkey in 32-bit mode. Open the Applications folder in Finder, control-click (right-click) the Firefox.app or SeaMonkey.app and select "Get Info". Make sure the box in front of "Open in 32-bit mode" is not checked (if it is, remove the check-mark). [http://java.com/en/download/faq/java_mac.xml#sysreq] [https://support.mozilla.org/en-US/questions/975269] *'''On 64-bit Windows''', if you only have the 64-bit version of Java installed, the Java plugin will not be available since current Firefox and SeaMonkey releases are 32-bit browsers. You'll need to install the 32-bit Java version ([[#On Windows|see below]]). [http://www.java.com/en/download/faq/java_win64bit.xml] *'''On Windows''', if the '''Java(TM) Platform SE''' plugin is not detected and you recently updated to Java 7 Update 10 or Update 11, [[#Uninstall_JavaFX |uninstall JavaFX]], if installed (see below). *'''On Windows''', Mozilla browsers use [[plugin scanning]] to locate installed plugins in locations external to Firefox or SeaMonkey. Java and other plugins in directories [https://developer.mozilla.org/en-US/docs/Adding_Extensions_using_the_Windows_Registry#Plugins specified in the Windows registry] for [http://www-archive.mozilla.org/projects/plugins/plugin-identifier.html#definitions PLIDs] will not be detected if the preference '''plugin.scan.plid.all''' has been set to "false". To resolve, open [[about:config]] and reset the preference to "true" (the default value), then restart Firefox or SeaMonkey. [https://support.mozilla.org/en-US/questions/938258#answer-371433] <snip> ===Enabling and disabling Java from the Java Control Panel=== ''Applies to Windows or Mac OS X 10.7.3 and above'' Starting in Java 7, the [http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/jcp.html Java Control Panel] includes the Security option, "Enable Java content in the browser", which is selected by default. De-selecting this option will prevent Java applets from running in any browser and the Java plugin will no longer appear in the Firefox or SeaMonkey Add-ons Manager or [[about:plugins]] list. To view or change this option, click the Java icon in the Windows Control Panel or Mac OS X System Preferences to open the Java Control Panel, then select the Security tab. See [https://www.java.com/en/download/help/enable_panel.xml this Java Help page] for details. [http://www.oracle.com/technetwork/java/javase/7u10-relnotes-1880995.html] [http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/jcp.html#security] [http://www.java.com/en/download/help/jcp_security.xml]
  2. Wesley Branton 165 posts

    Would I be able to just copy and paste the Java Installed But Not In Add-ons Manager you have put in your original post to the article and format it?

    If I can, I would be able to do this.

    I would certainly change the writing to make it flow better and add FOR functions and all of that stuff.

    Would I be able to just copy and paste the ''Java Installed But Not In Add-ons Manager'' you have put in your original post to the article and format it? If I can, I would be able to do this. I would certainly change the writing to make it flow better and add FOR functions and all of that stuff. ----

    Modified by Wesley Branton on

  3. Wesley Branton 165 posts

    I added the section to the article.

    There is currently no Linux section though.

    I added the section to the article. There is currently no Linux section though.
  4. AliceWyman 6243 posts

    Wesley Branton said

    I added the section to the article. There is currently no Linux section though.

    Reviewed:

    I would make the new Java plugin does not appear in the Add-ons Manager section the FIRST one under Troubleshooting.

    The "pluginreg.dat" section also applies to Linux users so it should be shown for everyone. You could link to Re-initializing the plugins database for steps to delete the pluginreg.dat file.

    The "Enable Java content in the browser" in the Java Control Panel's Security tab may apply to Linux, as well as Windows and Mac. A Linux user would have to confirm but in the meantime, I'd just show it for Mac and Windows like you did.

    Remove the JavaFX point since that's already covered in its own section

    I was planning to get to this eventually but thanks for getting the ball rolling!

    ''Wesley Branton [[#post-9257|said]]'' <blockquote> I added the section to the article. There is currently no Linux section though. </blockquote> '''Reviewed:''' I would make the new '''Java plugin does not appear in the Add-ons Manager''' section the FIRST one under Troubleshooting. The "pluginreg.dat" section also applies to Linux users so it should be shown for everyone. You could link to [[Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems#w_re-initializing-the-plugins-database|Re-initializing the plugins database]] for steps to delete the pluginreg.dat file. The "Enable Java content in the browser" in the Java Control Panel's Security tab may apply to Linux, as well as Windows and Mac. A Linux user would have to confirm but in the meantime, I'd just show it for Mac and Windows like you did. Remove the JavaFX point since that's already covered in its own section ----- I was planning to get to this eventually but thanks for getting the ball rolling!
  5. Wesley Branton 165 posts

    There you go.
    Sent it to be reviewed.

    There you go.<br> Sent it to be reviewed.
  6. AliceWyman 6243 posts

    I'm sorry I took so long to get to this.

    I made a new revision with more edits. Could you (or anyone else) take a look and see if I missed anything? I haven't marked it ready to localize yet.

    I'm sorry I took so long to get to this. I made a new revision with more edits. Could you (or anyone else) take a look and see if I missed anything? I haven't marked it ready to localize yet.
  7. AliceWyman 6243 posts

    I made another revision to add a Java test page and I updated a link for the Java Control Panel. I'll mark this one ready to localize.

    I made another revision to add a Java test page and I updated a link for the Java Control Panel. I'll mark this one ready to localize.