Firefox use lot of cpu
I have a notebook nb510 Toshiba with Ubuntu 12.04 and firefox 22.0 with extensions like addock-plus, x-notifier, download helper, xmarks. Sometimes it's take more cpu than 100% This information of firefox:
@nb510:~$ top
top - 02:23:57 up 18 min, 2 users, load average: 0.42, 0.39, 0.36
Tasks: 153 total, 1 running, 152 sleeping, 0 stopped, 0 zombie
Cpu(s): 3.9%us, 0.8%sy, 0.0%ni, 95.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2047344k total, 741132k used, 1306212k free, 54984k buffers
Swap: 2068352k total, 0k used, 2068352k free, 370208k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2320 john 20 0 576m 117m 36m S 117 5.9 1:31.67 firefox
1015 root 20 0 120m 39m 7588 S 9 2.0 2:02.09 Xorg
2088 john 20 0 92592 15m 11m S 7 0.8 0:11.30 gnome-terminal
2183 john 20 0 2852 1176 888 R 1 0.1 0:08.58 top
9 root 20 0 0 0 0 S 0 0.0 0:06.83 kworker/1:0
1 root 20 0 3636 2052 1316 S 0 0.1 0:01.80 init
2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0 0.0 0:00.02 ksoftirqd/0
6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
7 root RT 0 0 0 0 S 0 0.0 0:00.24 watchdog/0
8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1
10 root 20 0 0 0 0 S 0 0.0 0:00.13 ksoftirqd/1
12 root RT 0 0 0 0 S 0 0.0 0:00.05 watchdog/1
13 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/2
15 root 20 0 0 0 0 S 0 0.0 0:00.03 ksoftirqd/2
16 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/2
17 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/3
18 root 20 0 0 0 0 S 0 0.0 0:00.88 kworker/3:0
and this from firefox
Paramètres de base de l'application
Nom
Firefox
Version
22.0
Agent utilisateur
Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:22.0) Gecko/20100101 Firefox/22.0
Configuration de compilation
about:buildconfig
Extensions
Nom
Version
Activée
ID
British English Dictionary
1.19.1
true
[email protected]
DownloadHelper
4.9.17
true
{b9db16a4-6edc-47ec-a1f4-b86292ed211d}
Element Hiding Helper pour Adblock Plus
1.2.3
true
[email protected]
Ubuntu Firefox Modifications
2.6
true
[email protected]
Xmarks
4.2.1
true
[email protected]
X-notifier
3.3.3
true
{37fa1426-b82d-11db-8314-0800200c9a66}
Préférences modifiées importantes
Nom
Valeur
accessibility.typeaheadfind.flashBar
0
browser.cache.disk.capacity
1048576
browser.cache.disk.smart_size_cached_value
1048576
browser.cache.disk.smart_size.first_run
false
browser.places.smartBookmarksVersion
4
browser.startup.homepage
http://www.google.fr/ig
browser.startup.homepage_override.buildID
20130627161504
browser.startup.homepage_override.mstone
22.0
dom.mozApps.used
true
extensions.lastAppVersion
22.0
network.cookie.prefsMigrated
true
places.database.lastMaintenance
1375143077
places.history.expiration.transient_current_max_pages
52413
plugin.disable_full_page_plugin_for_types
application/pdf
plugin.importedState
true
privacy.sanitize.migrateFx3Prefs
true
security.warn_viewing_mixed
false
storage.vacuum.last.index
0
storage.vacuum.last.places.sqlite
1375140331
Accélération graphique
Description de la carte
VMware, Inc. -- Gallium 0.4 on llvmpipe (LLVM 0x300)
Fenêtres avec accélération graphique
0/1 Basic Bloqué pour la version de votre pilote graphique.
ID du périphérique
Gallium 0.4 on llvmpipe (LLVM 0x300)
ID du vendeur
VMware, Inc.
Rendu WebGL
Bloqué pour la version de votre pilote graphique.
Version du pilote
2.1 Mesa 8.0.4
AzureCanvasBackend
cairo
AzureContentBackend
none
AzureFallbackCanvasBackend
none
JavaScript
Ramasse-miettes incrémentiel
true
Accessibilité
Activée
false
Empêcher l'accessibilité
0
Versions des bibliothèques
Version minimale attendue
Version utilisée
NSPR
4.9.6
4.9.6
NSS
3.14.3.0 Basic ECC
3.14.3.0 Basic ECC
NSSSMIME
3.14.3.0 Basic ECC
3.14.3.0 Basic ECC
NSSSSL
3.14.3.0 Basic ECC
3.14.3.0 Basic ECC
NSSUTIL
3.14.3.0
3.14.3.0
Thank you for your help
It seems to me that you aren't using the Hardware Acceleration (which could lead to high CPU consumption, or your hardware don't support it). If you have your Video drivers updated and correctly configured, you could force Firefox to use Hardware acceleration:
- Open
about:config, accept that you know what you are doing (technically it's me) - Search for
layers.acceleration.force-enabled. If it's not created, right click an empty area, hit New > Boolean, and name it aslayers.acceleration.force-enabled. - Right click
layers.acceleration.force-enabledand hit Toggle. - Restart firefox and check your CPU consumption, should be manageable now.
How to know if you have HW-Accel
- Open up a terminal.
- Run
sudo apt-get install mesa-utils - Once it finish run
glxinfo | grep render -
It should have a line that reads:
direct rendering: Yes
OpenGL renderer string: Gallium 0.4 on ATI RV515 (this line could be whatever)
If it's says No or the second line says Software rasterizer it means you are doomed needs to configure your video card (if it supports HWA) or buying a new shinny card.
Quite possible is that the root of the slowdown is one or several of installed FF extensions. Try disabling them one by one to see if they cause the problem. Initially, you may disable all of them to see if FF consumes significantly less resources in your case (there is an option in Help menu Restart with Add-ons Disabled...)
See a detailed instruction here: https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems
UPD: There is a list of known problematic FF extensions, to ease problem detection: http://kb.mozillazine.org/Problematic_extensions
I found the posting of @Hadi in a similar thread. [Link deleted because offline]
Try this solution
- Open Firefox.
- Type 'about:Config' into the address line and hit Go or return. This takes you into the Firefox expert Config menu.
See if there is an entry called browser.cache.disk.capacity.
If Yes then modify the value to 16384, close Firefox and restart Firefox.
- If No right click somewhere on the about:Config page and select Integer. Create an Integer entry called 'browser.cache.memory.capacity' and set it to 16384. Close Firefox and restart Firefox.
If this solution not work then install an AdBlock extension such as Adblock Plus