multiple firefox open in task manager
today 4/18/2024 firefox update. Now browser is slow. Task manager showing currently 15 firefox open, even though only one new tab is selected. It is causing laptop to overheat, fan is running constantly. Nothing else is open.
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Your screenshot looks normal and the high CPU does not appear to be associated with a Firefox process.
You can visit about:processes in the address bar (Shift+Esc) to get more details about each process.
Reduce the number of processes per site by changing dom.ipc.processCount.webIsolated to 1 in about:config.
It is quite normal to see more Firefox processes running.
- process for the main Firefox thread (user interface)
- one or more content processes
you see more content processes when Fission is enabled - process for the compositor thread
- process for extensions
- process for 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 and Fission Windows
"Remote Processes" (Web Content)
You can check the about:memory and about:processes pages for info about all processes. See also the about:unloads page for info about the tabs.