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linux:prepare:prepare:firefox [2020/10/28 08:42] – created niziaklinux:prepare:prepare:firefox [2023/10/17 09:20] (current) – niziak
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 ===== Disable Detachable Tabs in Mozilla Firefox ===== ===== Disable Detachable Tabs in Mozilla Firefox =====
-  * `about:config` +  * ''about:config'' 
-  * `browser.tabs.allowTabDetach`+  * ''browser.tabs.allowTabDetach'' 
 + 
 + 
 +===== limit memory usage ===== 
 + 
 +==== cgroups ==== 
 + 
 +References: 
 +  * [[https://gist.github.com/hrishikeshrt/dab05d42fc60144909cdbde2cc3f4d2c|Limit Memory Usage using cgroups]] 
 +  * [[https://gist.github.com/hardfire/7e5d9e7ce218dcf2f510329c16517331]] 
 +  * [[https://gist.github.com/avoidik/1c7c53f02461f716aabebf3372a6199d]] 
 + 
 +But now we have some modern systemd based tools. 
 + 
 +==== systemd ==== 
 + 
 +[[https://wiki.archlinux.org/title/cgroups]] 
 + 
 +<file bash /usr/local/bin/firefox> 
 +#!/bin/bash 
 +systemd-run --user -G --scope --unit=run-firefox -p OOMPolicy=continue -p MemoryMaxigh=4G -p MemoryMax=5G -p MemorySwapMax=2G -p "CPUQuota=200%" /usr/bin/firefox "$@" 
 +</file> 
 + 
 +or 
 + 
 +<file bash /usr/local/bin/firefox> 
 +#!/bin/bash 
 +systemd-run --user -G --scope --unit=run-firefox -p OOMPolicy=continue -p MemoryHigh=50% -p MemoryMax=60% -p MemorySwapMax=2G -p "CPUQuota=200%" /usr/bin/firefox "$@" 
 +</file> 
 + 
 +See [[https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html#MemoryMax=bytes|MemoryMax]] 
 + 
 +Verify limits: 
 +<code bash> 
 +systemctl list-units --user --type scope 
 +systemctl status --user run-firefox.scope 
 + 
 + Memory: 201.3M (max: 2.0G swap max: 2.0G available: 1.8G) 
 +</code> 
 + 
 +Modify limits without restarting firefox: 
 +<code bash> 
 +systemctl set-property --user run-firefox.scope MemoryMax=8G MemorySwapMax=10G 
 +</code> 
 + 
 +==== firejail ==== 
 + 
 +<code bash> 
 +sudo apt install firejail 
 + 
 +firejail --noprofile --rlimit-as=5g firefox 
 + 
 +</code> 
 + 
 +<code> 
 +       --rlimit-as=number 
 +              Set the maximum size of the process's virtual memory (address space) in bytes.  Use k(ilobyte), m(egabyte) or g(igabyte) for size suffix (base 1024). 
 +</code> 
 + 
 +[[https://wiki.archlinux.org/title/Firejail#Using_Firejail_by_default|Using_Firejail_by_default]]