Firefox running sub process in chroot [Solved]

[iandoug]

Hi all

Is it normal for Firefox to spawn a chroot process?

Thanks, Ian

[Juippisi]

I don't fully understand the question, but yes, browsers have internal sandboxing abilities which may show up like this.

[Banana]

Just startet the browser minutes ago and it looks like this:

Code: Select all

banana   11875  0.0  0.1 207176 34048 tty1     Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -parentBuildID 20231009140911 -prefsLen 28164 -prefMapSize 233699 -appDir /opt/firefox/browser {2cc5d50e-fc49-4595-b246-04c8d896cf19} 11793 true socket
banana   11901  0.0  0.3 2458944 104860 tty1   Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 1 -isForBrowser -prefsLen 29089 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {e30f52c6-d55a-492a-854b-b0852c4749e2} 11793 true tab
banana   11960  0.3  0.4 23718036 144780 tty1  Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 2 -isForBrowser -prefsLen 33825 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {339fdbcc-bda0-45f8-b296-7590842517aa} 11793 true tab
banana   12026  0.0  0.0 205948 31360 tty1     Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -parentBuildID 20231009140911 -sandboxingKind 0 -prefsLen 33825 -prefMapSize 233699 -appDir /opt/firefox/browser {f6825ed0-acf7-47ef-b07d-7fa9e18ca5a3} 11793 true utility
banana   12042  0.3  0.3 2483392 120568 tty1   Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 3 -isForBrowser -prefsLen 27918 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {674fa2f0-2b0b-4d8a-b07a-050321469c96} 11793 true tab
banana   12044  0.1  0.3 2463032 105232 tty1   Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 4 -isForBrowser -prefsLen 27918 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {d55e5d38-8047-4d78-9f1e-75f81b9afb13} 11793 true tab
banana   12131  0.4  0.3 2468868 99920 tty1    Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 6 -isForBrowser -prefsLen 27999 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {9d55a72d-393f-4292-ac58-5bf4a423bc3f} 11793 true tab
banana   12196  0.0  0.1 2395536 61648 tty1    Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 7 -isForBrowser -prefsLen 27999 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {07608e76-9ba8-49e3-bc80-592e58d2d2cf} 11793 true tab
banana   12199  0.0  0.1 2395536 61728 tty1    Sl   08:49   0:00 /opt/firefox/firefox-bin -contentproc -childID 8 -isForBrowser -prefsLen 27999 -prefMapSize 233699 -jsInitLen 234236 -parentBuildID 20231009140911 -greomni /opt/firefox/omni.ja -appomni /opt/firefox/browser/omni.ja -appDir /opt/firefox/browser {4660c090-1357-4ba1-9b1b-b82a4b55a578} 11793 true tab

I dunno if there is a "chroot" process, but it is totally normal that FF (and even others) spawn multiple processes.

[iandoug]

hi

okay, thanks. I am aware FF spawns lots of things, but don't recall seeing a CHROOT process before.

I had run a PHP program which foolishly tried to suck a large file into memory. This pushed CPU to 100% as well as using up all the memory.

It eventually crashed, but CPU still stayed high and PC was very sluggish so I looked at what was running, and noticed the CHROOT, linked to FF.

Eventually restarted desktop.

In the past my CPU, when doing "nothing", was around 5%, but in recent times it is 12-13%, which bothers me .... but I can't figure out what is using the cycles ... so I worry about unwanted processes running ...

cheers, Ian

[Banana]

do you have any logs or terminal output you can show us?