1656676 - Firefox exceeds settings content process limit

Status: RESOLVED WORKSFORME

(Core :: DOM: Content Processes, defect, P3)

Description

[lsd.sys]

Attachment: Settings and Task manager

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:79.0) Gecko/20100101 Firefox/79.0

Steps to reproduce:

Firefox exceeds the number of content processes while browsing

Actual results:

Five processes instead of three basic ones

Comment 1

[BugBot [:suhaib / :marco]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Neha Kochar [:neha]]

The number of processes you might see may not all be web content processes, there are others like GPU process also.
Please provide your about:support and we can see if the web content processes are actually exceeding the set limit.

Comment 3

[lsd.sys]

Attachment: about support.txt

Comment 4

[lsd.sys]

Attachment: command line from process explorer.txt

Comment 5

[Tom S. (please needinfo tschuster)]

"processes": {
  "remoteTypes": {
    "web": 1,
    "extension": 1,
    "privilegedabout": 1,
    "gpu": 1
  },
  "maxWebContentProcesses": 1
},

You have one (web) content process, which is what that option is supposed to control. Besides that one process for extensions, one for privileged about pages, and one for the GPU. So this seems correct to me. This is basically the lowest number of processes possible. (Removing all extensions might disable the extension process)

Comment 6

[lsd.sys]

Ok I understand. I was confused by the higher number of processes. Firefox is starting to separate everything into processes just like chrome.

Comment 7

[Andrew McCreight [:mccr8]]

(In reply to lsd.sys from comment #6)

Ok I understand. I was confused by the higher number of processes. Firefox is starting to separate everything into processes just like chrome.

Yes. Unfortunately, from the perspective of overhead, this is necessary to improve security.