How to Stop “plugin-container.exe” Process in Firefox 4.0.x?

Firefox browser is running slow? Too many processes when you use Firefox? If yes, you may need to get rid of Firefox plugin-container.exe process. You can easily do that by following my step by step guide to How to Stop “plugin-container.exe” Process in Firefox 3.6.x? Still no luck? Probably you are using Firefox 4. In that case, you need to follow some different step! In fact, many users asked me how to stop plugin-container.exe process in Firefox 4. This article is for those who wants to stop plugin-container process in Firefox version 4.


Steps to Remove or Stop Plugin-container Process in Firefox 4:

  1. Enter about:config in the Firefox address bar.
  2. Ignore the warning and go ahead by pressing “I’ll be careful, I promise!” button.
  3. Enter dom.ipc.plugins.enabled in the Filter field.
  4. One preference will appear. Change it’s value from true to false.
  5. Right click in the white space below Preferences Name.
  6. From the menu select Boolean under New.
  7. Enter new Boolean Value as dom.ipc.plugins.enabled.npctrl.dll
  8. Then enter the boolean value as false.
  9. Repeat the step from Step 5 to add the following preferences: dom.ipc.plugins.enabled.npqtplugin.dll,
  10. Look at the screenshot. Once all preferences are set, restart Firefox. Browse Internet as usual. Now you should see the difference!

Copy the 4 preferences from here:


This fix worked for me. I hope it will also help you stop or get rid of plugin-container.exe in Firefox 4.

This is not a Firefox speed improvement hack. This simple fix takes care of a Firefox related process called Plugin-container.exe. This process was supposed to protect you from Firefox crashes. But it useless, as it consumes a lot of memory (when more than one plugins run in separate plugin-container process) and often leads to a frozen browser. You can free a good amount of memory by getting rid of Plugin-container.exe. If you are running a rig with huge amount of memory, ignore this. This fix may help those who have a slower or low memory computer.

I published this to help Firefox users (Windows and Linux). If you feel like it is not for you, just ignore it.