How To Disable Plugin-Container.exe on Firefox

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By default, Firefox loads plug-ins in a separate process called plugin-container.exe, which is meant to keep the main Firefox process (firefox.exe) unscathed in the event of a plug-in error or crash.

Plugin-container is known for being resource intensive (CPU and RAM). But fortunately, it can be disabled without disrupting the browser's operation.

Optimize Firefox for Low CPU and RAM Usage

in the address bar and press Enter. When prompted, click on I'll be careful, I promise! to proceed to the preferences window:

Search for an entry that reads dom.ipc.plugins.enabled and set its value to False:

Close the preferences window and restart Firefox to apply your new changes.
Jean-François Pillou

Jean-François Pillou - Founder of CCM
Better known as Jeff, Jean-François Pillou is the founder of He is also CEO of CCM Benchmark and digital director at the Figaro Group.

Learn more about the CCM team