Closed Bug 793732 Opened 13 years ago Closed 12 years ago

Having any add-on enabled pegs CPU usage at high, consistent amount

Categories

(Firefox :: General, defect)

Product:
Firefox
Component:
General
Version:
17 Branch
Platform:
x86
Windows XP
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED WORKSFORME

People

(Reporter: ben.striegel, Unassigned)

Details

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/17.0 Firefox/17.0 Build ID: 20120924042009 Steps to reproduce: Windows XP. Disabled all plugins, themes, and add-ons and closed all Panorama groups and tabs (except for the add-ons manager) and restarted the browser. Firefox is now at 0% CPU usage. Enabled one add-on (doesn't really matter which, reproduces with *most* of my add-ons, but *not* all; a partial list: Firebug 1.10.3, Adblock Plus 2.1.2, TileTabs 7.1, User Agent RG 1.0) and restarted the browser. Does not matter if the add-on is restartless or not (no effect on CPU until after restart). Actual results: 95% of the time, Firefox's CPU usage is now pegged at ~50% (the other 5% of the time it remains at 0%, as normal). If the add-on is restartless, disabling it has no effect on CPU. Interestingly, I can then disable the add-on and restart the browser once more, and Firefox will *still* be pegged at 50% CPU usage, even with no add-ons whatsoever enabled. One more restart is required to return to 0% CPU. After that, additional restarts will not cause the 50% CPU usage to recur until an add-on is enabled. Expected results: With no plugins, themes, or tabs, and only one add-on, Firefox should remain near 0% CPU rather than a consistent 50%. The browser should not still be using this extreme amount of CPU even after restarting without any add-ons.
I don't agree that Firefox should be at 0%, all applications use some percentage of CPU when loaded. However, if nothing is loaded it should not be as high as 50%. Please try the latest Nightly from nightly.mozilla.org and a new profile by running firefox.exe -P.
Component: Untriaged → General
WFM with Firebug and Addblock on the current Firefox versions (25-26). Ben, can you reproduce this issue with current builds?
Flags: needinfo?(ben.striegel)
@Ioana, I have not been able to reproduce with recent builds of Firefox. This bug can probably be closed (I'm not sure if there's some procedure for that).
Flags: needinfo?(ben.striegel)
Thanks Ben!
Status: UNCONFIRMED → RESOLVED
Closed: 12 years ago
Resolution: --- → WORKSFORME
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