Plugin container exe on firefox

Recently, my laptop has become so laggy. Even moving the mouse pointer is a hard work. I don't know why, at first. But then i noticed that the strange things happened when Firefox was running.

As usual, i'm looking on my beloved Windows Task Manager. I could see that Firefox is consuming about 500 MB memory. Well, that's natural, since i've always opened lots of tabs. But this didn't satisfy me, because i knew that this is quite normal for me. There must be something else.

At first, i got suspicious that this was the results of windows updates. But then, i couldn't find any evidence to prove it.

After experiencing another lag sessions, i decided to kill my Firefox from task manager. And that's when i saw this particular process, it's called "plugin-container.exe". The description for this program is "Firefox Plugin Container". This is suspicious enough for me, since i didnt know that firefox had a feature like this.

After googling about it, i found that this exe is a new feature, released along with 3.6.4 version. It's usage was to "contain" all the plugins that Firefox had, for example Flash plugin, so that when the plugin crashed, it didn't crash the whole browser.

So i followed these tweak to disable this the-so-called container.
It's via about:config, and change these items to FALSE :
dom.ipc.plugins.enabled
dom.ipc.plugins.enabled.npctrl.dll (Microsoft Silverlight)
dom.ipc.plugins.enabled.npqtplugin.dll (Apple QuickTime)
dom.ipc.plugins.enabled.npswf32.dll (Adobe Flash)
dom.ipc.plugins.enabled.nptest.dll (NPAPI test plugin)

After that, restart the Firefox, and good bye the lag!!