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In File Explorer sometimes there are 5 or 10 instances of Firefox all running at the same time. Is this normal?

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I don't need to understand why so many instances of Firefox run in File Explorer. I'd just like to know if that is normal operation. Thanks!

I don't need to understand why so many instances of Firefox run in File Explorer. I'd just like to know if that is normal operation. Thanks!

Chosen solution

hi mike, yes what you're observing is normal - firefox is a multi-process application, which is running tabs and other tasks in separate processes for security, stability and performance reasons: https://wiki.mozilla.org/Electrolysis#Overview

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0 OpenH264 Video Codec provided by Cisco Systems, Inc.

Widevine Content Decryption Module provided by Google Inc

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0

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philipp
  • Top 25 Contributor
  • Moderator
5330 solutions 23532 answers

Chosen Solution

hi mike, yes what you're observing is normal - firefox is a multi-process application, which is running tabs and other tasks in separate processes for security, stability and performance reasons: https://wiki.mozilla.org/Electrolysis#Overview

hi mike, yes what you're observing is normal - firefox is a multi-process application, which is running tabs and other tasks in separate processes for security, stability and performance reasons: https://wiki.mozilla.org/Electrolysis#Overview

Modified by philipp

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Question owner

Thanks Philipp!

Thanks Philipp!
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cor-el
  • Top 10 Contributor
  • Moderator
17669 solutions 159831 answers

It is quite normal to see more Firefox processes running.

  • one process for the main Firefox thread (user interface)
  • one or more content processes, see:
    Options/Preferences -> General -> Performance
    remove checkmark: [ ] "Use recommended performance settings"
  • one process for the compositor thread
  • one process for the WebRender when this feature is enabled

You can find the current multi-process state on the Troubleshooting Information page (about:support).

  • "Help -> Troubleshooting Information" -> "Application Basics":
    Multiprocess Windows
    Remote Processes

See also the Remote Processes section further down for more detail.

It is quite normal to see more Firefox processes running. *one process for the main Firefox thread (user interface) *one or more content processes, see:<br>Options/Preferences -> General -> Performance<br>remove checkmark: [ ] "Use recommended performance settings" *one process for the compositor thread *one process for the WebRender when this feature is enabled You can find the current multi-process state on the Troubleshooting Information page (about:support). *"Help -> Troubleshooting Information" -> "Application Basics":<br>Multiprocess Windows<br>Remote Processes See also the Remote Processes section further down for more detail.
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Senali Madawala
  • Top 25 Contributor
2 solutions 161 answers
That is normal. may help: https://support.mozilla.org/en-US/questions/1217583#answer-1111518 https://wiki.mozilla.org/Electrolysis#Overview
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