This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do I enable a Java plug-in via script that was just added to the blocklist?

  • 2 cavab
  • 3 have this problem
  • 3 views
  • Last reply by cor-el

more options

I need to enable Java 6u29 that was just added to the blocklist via script because there are several thousand end-nodes involved. Also, I am constrained to Firefox 3.6 due application compatibility issues.

I need to enable Java 6u29 that was just added to the blocklist via script because there are several thousand end-nodes involved. Also, I am constrained to Firefox 3.6 due application compatibility issues.

All Replies (2)

more options

The script has added Java 6u29 to the fx 3.6 blocklist on several thousand end-nodes and you need to revert the action/unblock Java? Have I understood it correctly?

more options

Probably the only or easiest way to remove or disable the blocklist of older Java versions would be to disable blocklisting by locking the extensions.blocklist.enabled to false via a mozilla.cfg file.
You are already running a no longer supported Firefox 3.6.x version that won't receive updates.

You can use a mozilla.cfg file in the Firefox program folder to lock prefs or specify new (default) values.

Place a file local-settings.js in the defaults\pref folder where you also find the file channel-prefs.js to specify using mozilla.cfg.

pref("general.config.filename", "mozilla.cfg");
pref("general.config.obscure_value", 0); // use this to disable the byte-shift

See:

You can use these functions in mozilla.cfg:

defaultPref();  // set new default value
pref();         // set pref, but allow changes in current session
lockPref();     // lock pref, disallow changes

lockPref("extensions.blocklist.enabled", false);