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

Plugin-container is a cpu hog. I need to end the program. Harmful?

more options

Cpu usage is 100% due to plugin-container.exe

This happened

Every time Firefox opened

== Firefox update

Cpu usage is 100% due to plugin-container.exe == This happened == Every time Firefox opened == Firefox update

All Replies (1)

more options

http://kb.mozillazine.org/Plugin-container_and_out-of-process_plugins ---

Try to disable IPC. You can set the prefs dom.ipc.plugins.enabled.* to false on the about:config page to disable the plugin-container process to see if that helps. dom.ipc.plugins.enabled.npswf32.dll (Flash) dom.ipc.plugins.enabled.npctrl.dll (Silverlight) dom.ipc.plugins.enabled.npqtplugin.dll (QuickTime)

To open the about:config page, type about:config in the location (address) bar and press the Enter key, just like you type the url of a website to open a website. If you see a warning then you can confirm that you want to access that page.

Double-click each of those prefs to toggle them to false, then restart Firefox.