Could you check these articles: * [[Firefox's performance settings]] * [[Firefox uses too much memory or CPU resources - How to fix]]

Do you have issues about the multi-process feature in Firefox or do you have a problem ? 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. You can check the Firefox Task Manager (about:performance) and about:memory pages. *https://support.mozilla.org/en-US/kb/task-manager-tabs-or-extensions-are-slowing-firefox *https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-or-cpu-resources