Firefox is the second most widely used browser after the Internet explorer but the Firefox still gains an upper hand simply for the reason of the wide variety of add-ons and plugins it supports. The only main issue of the Firefox browser is that it consumes a lot of memory but for the variety of add-ons and plugins it supports, it comprehensively negates the problem of memory usage.
The Plug-in container.exe process is a new process that runs additionally to your Firefox.exe process on your Windows Task Manager. This plugin container.exe process has been introduced for all Firefox browsers later than the version 3.6. This process has been designed to manage the add-ons and plugins in a unique way. All the add-ons and plug-ins that you have enabled in your Firefox browser will run under the Plug-in container.exe process in your Windows Task Manager. See the snapshot below for details.
At the outset, this feature looks good because whenever a plugin or add-on crashes, the plug-in container.exe process comes into play by not letting your browser crash but this process consumes at least 30-40 MB of your Primary memory.
The following section describes how to disable the Plug-in container.exe process in Windows
1) In your Firefox address bar, type about:config and press Enter.
2) In “This will void your warranty” page thus opened, click on “I’ll be careful, I promise” to continue into the about:config page.
3) In the about:config page, under Filter field, type dom.ipc and you should see the following results displayed.
4) Now, right click on each entry and select Toggle to change their values form True to False and vice versa. i.e., change the value to True if the default value of the entry was false and change the value to False if the default value for the entry was True.
5) Keep the value of the last entry as True regardless of the default value. The following image shows a snapshot of how all the entries should look like after changing their values.
Now, restart your Firefox and then open the Task Manager window and you will see that the plug-incontainer.exe process not displayed in it.
NOTE: if you disable the plug-in container.exe process, you will be able to play all of the flash videos in your browser but when a plugin or an add-on that you will currently be using gets crashed or becomes unresponsive, then you might stand a chance of getting the Firefox browser also crashed along with the plugin.