After uninstalling Java, have you spotted Java related Java Deployment Toolkit plugin in Firefox?, Yes, Java uninstaller not removed this one, don’t know why? These are annoyances users need to cope with Java and other software, if you install a program, that installs plugins and add-ons, its uninstaller should also remove them during their uninstall, is it not? Once this exists without Java on our systems knowing the use and purpose of it is not necessary. If you want to remove this plugin from Firefox, you’ve to follow the below procedure.
Removing Java Deployment Toolkit Plugin from Firefox
We can disable this plugin, but it makes sense to completely remove it from our computers. For that, close Firefox and any other browsers if running
1. Open run command, and type “ C:\Windows\system32\”
2. Search for npDeployJava1.dll file, once Windows search finds and shows it as a result, select and delete it.
Note: npDeployJava1.dll file is related to the Java Deployment Toolkit Plugin and it can be found in “System 32” directory under Windows.
Be sure to backup this file before deletion, so that you can restore if something goes wrong by pasting it in the same directory.
Do you want to remove unnecessary plugins from Chrome? Read How to Remove Plugins from Chrome.
Update 20/12/2013: If the above instructions doesn’t help, follow the ones below.
You can find that file here also on Windows
For 32-bi:t C:\Program Files\Java\jre7\bin\dtplugin\npdeployJava1.dll
For 64-bit : (If any 64-bit user helps I can add it here)
To easily know the path of this file if Java installed, open Firefox and visit about:plugins. As you all know, you’ve to delete that file.
Update November 29, 2014: Uninstalling Java now, also removes the Java Deployment Toolkit plugin from the Firefox browser, if it’s not happening in your case, you can follow the above instructions.