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I need java 1.5.0_10 to work or i can't use firefox,java is not in blocklist, now what?


I need this java to use for work related programs, i had it, it auto updated, i uninstalled and installed the version that i need. It (java) does not appear in the blocklist to enable.

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.5 r502
  • Windows Activation Technologies Plugin for Mozilla
  • iTunes Detector Plug-in
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • 4.1.10329.0
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers


  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0

More Information

turned off auto update, uninstalled version I could not use, intalled the version that my programs use. Followed instructions to unblock- it is not in unblock list.

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10754 solutions 96800 answers

That is not possible.

You need the Next-Generation Java™ Plug-In present in Java 6 U10 and later (npjp2.dll).

Question owner

It is not Java 6, it is java 5 and no java is present in the blocklist. When I bring up Java in the control panel, it will not allow me to enable for mozilla there either.

  • Top 10 Contributor
  • Moderator
10754 solutions 96800 answers

That check box for Mozilla is not for Firefox, but for the very old Mozilla Suite and possibly SeaMonkey.

You can't run Java 5 in current Firefox versions like I wrote and you can read in the above linked article because the classic Java not longer works in current Firefox versions.
Only Java 6 update 10 and later have this plugin and can work in current Firefox versions.

Such old Java versions also have a lot of unpatched security vulnerabilities.

Helpful Reply

ty for your reply, unfortunately i have no control over the version of java used. so essentially, i need to find an older version of firefox that will use java 5 or firefox becomes a filebox for google docs.