Join us to show up for other Firefox users 🦊. Earn fun badges and Mozilla swag vouchers! Find out more: https://mzl.la/askafox150

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Dalšne informacije

Toś ta nitka jo se archiwěrowała. Pšosym stajśo nowe pšašanje, joli trjebaśo pomoc.

Firefox memory leak

  • 4 wótegrona
  • 1 ma toś ten problem
  • 251 naglědow
  • Slědne wótegrono wót Dero
  • Archiwěrowany

Dero
Dero

Hello,

I use Firefox 73.0 (64-bit) on 5.3.18-1-MANJARO GNU/Linux and constantly faced with the fact that Firefox takes up all available memory until the computer freezes (12Gb RAM without swap). If I restart Firefox, initially memory usage is small, but after some websurfing it constantly grows, as if it were not clearing.

According to the about:memory report, most of the memory is occupied by the "chrome://browser/content/browser.xhtml". What is it and why does it take up so much memory?


Example:

7 tabs opened: https://i.imgur.com/W8zWXQZ.png

Memory usage report: https://pastebin.com/raw/MsTk2pAg

OS memory usage: https://pastebin.com/raw/3D5EUm61

OS memory usage after closing Firefox: https://pastebin.com/raw/q65AvTpa


I will be very grateful for your help!

Hello, I use Firefox 73.0 (64-bit) on 5.3.18-1-MANJARO GNU/Linux and constantly faced with the fact that Firefox takes up all available memory until the computer freezes (12Gb RAM without swap). If I restart Firefox, initially memory usage is small, but after some websurfing it constantly grows, as if it were not clearing. According to the about:memory report, most of the memory is occupied by the "chrome://browser/content/browser.xhtml". What is it and why does it take up so much memory? Example: 7 tabs opened: https://i.imgur.com/W8zWXQZ.png Memory usage report: https://pastebin.com/raw/MsTk2pAg OS memory usage: https://pastebin.com/raw/3D5EUm61 OS memory usage after closing Firefox: https://pastebin.com/raw/q65AvTpa I will be very grateful for your help!

Wót Dero změnjony

Wšykne wótegrona (4)

Dero
Dero Pšašaŕ

Tried some tricks. Still no luck. More details in this thread: http://forums.mozillazine.org/viewtopic.php?f=38&t=3059371&p=14857871#p14857871

FredMcD
FredMcD

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster

https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix

https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram

https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

https://support.mozilla.org/en-US/kb/firefox-takes-long-time-start-up

cor-el
cor-el
  • Moderator
  • Top 10 Contributor

"chrome://browser/content/browser.xhtml" is the main Firefox window including the user interface.

Did you check the Firefox Task Manager (about:performance) as well?

Dero
Dero Pšašaŕ

I tried investigate the issuse in this thread: http://forums.mozillazine.org/viewtopic.php?f=38&t=3059371&p=14857871#p14857871

Brief of the investigation:

  • Firefox Task Manager (about:performance) doesn't show what takes the memory. Screenshot: https://i.imgur.com/QuT6LMl.png
  • about:memory GC (Garbage Collection) didn't affect memory usage
  • In Safe-Mode memory use is better then default mode, no freezes, but is still too high, I think. For some reason memory report doesn't works in safe-mode. Firefox uses 1486Mb RAM (5069Mb virt). After restarting and reloading tabs it uses 320Mb Screenshot: https://i.imgur.com/5ZxrE8J.png Also after restarting (in safe-mode again) memory report works well.
  • Refreshing from about:support doesn't helps

Wót Dero změnjony