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Wondering about multiple processes running simultaneously

Posted

I installed FF 57.0, 64-bit on my Win7 box and was checking out my processes in the Task Manager. I saw five FF processes all running, using much memory. It looks as if there is a process running for each tab, which I never saw in previous versions of FF. What's going on and is there a way to cut back on this?

I installed FF 57.0, 64-bit on my Win7 box and was checking out my processes in the Task Manager. I saw five FF processes all running, using much memory. It looks as if there is a process running for each tab, which I never saw in previous versions of FF. What's going on and is there a way to cut back on this?
Attached screenshots

Chosen solution

Firefox has been a multiprocess application since around Firefox 49. The number of content processes was increased in Firefox 54. Some Legacy extensions were incompatible with multiprocess, so possibly Firefox 57 is the first time your Firefox is using it.

To adjust the number of processes, see: Firefox's performance settings.

Also, if you use View > Select Columns on the Processes tab of the Windows 7 Task Manager, you can add Command Line which will help you distinguish the content processes from the main browser process.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 27.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0

More Information

jscher2000
  • Top 10 Contributor
8315 solutions 68040 answers

Chosen Solution

Firefox has been a multiprocess application since around Firefox 49. The number of content processes was increased in Firefox 54. Some Legacy extensions were incompatible with multiprocess, so possibly Firefox 57 is the first time your Firefox is using it.

To adjust the number of processes, see: Firefox's performance settings.

Also, if you use View > Select Columns on the Processes tab of the Windows 7 Task Manager, you can add Command Line which will help you distinguish the content processes from the main browser process.

Firefox has been a multiprocess application since around Firefox 49. The number of content processes was increased in Firefox 54. Some Legacy extensions were incompatible with multiprocess, so possibly Firefox 57 is the first time ''your'' Firefox is using it. To adjust the number of processes, see: [[Firefox's performance settings]]. Also, if you use View > Select Columns on the Processes tab of the Windows 7 Task Manager, you can add Command Line which will help you distinguish the content processes from the main browser process.

Helpful Reply

Thanks for the info. I also noticed the processes are still going even though I've closed all the tabs but one. Seems rather wasteful.

Thanks for the info. I also noticed the processes are still going even though I've closed all the tabs but one. Seems rather wasteful.
Mike109 0 solutions 46 answers

As other people have mentioned, there is no option to change “Content process limit” in FF57. Look at the last reply. https://support.mozilla.org/en-US/questions/1183315

As other people have mentioned, there is no option to change “Content process limit” in FF57. Look at the last reply. https://support.mozilla.org/en-US/questions/1183315
jscher2000
  • Top 10 Contributor
8315 solutions 68040 answers

Hi Mike109, the other post mentions that you can't get Firefox to run in a single process (browser + content in one); I haven't tested that. However, you should be able to reduce the number of content processes, so in theory, a total of 2 firefox.exe processes (browser, content, in two). What is your experience?

Hi Mike109, the other post mentions that you can't get Firefox to run in a single process (browser + content in one); I haven't tested that. However, you should be able to reduce the number of content processes, so in theory, a total of 2 firefox.exe processes (browser, content, in two). What is your experience?