1298663 - High CPU usage (95-100%)

Status: RESOLVED DUPLICATE of bug 950396

(Firefox :: Untriaged, defect)

Description

[Eugene Savitsky]

Attachment: Скриншот 2016-08-28 13.15.43.png

On a notebook I do often see this picture: (see screenshot).

Currently only 6 tabs with static pages where open. Is there a way to see witch tab uses all the CPU?

Comment 1

[Eugene Savitsky]

Attachment: firefox.txt

about:support data

Comment 3

[Eugene Savitsky]

The bug is not about per-tab CPU and RAM monitor.
The bug is about why FF is using 100% CPU.

I will get the URL's on which FF is using CPU.

Comment 4

[Emil Pasca [:emilpasca]]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0

I have tested this issue on Windows 10 x64 with the latest Firefox release (48.0.2) and the latest Nightly (51.0a1-20160911030419) and could not reproduce it.
After opening different websites in multiple tabs in the browser, the CPU usage is normal (1-10%).

Can you please retest this using the latest Firefox release and the latest Nightly build (https://nightly.mozilla.org/) and report back the results? When doing this, please use a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/PNe90E).

Could you also provide us with the number of tabs and/or the URLs that you have loaded in the browser in order to retest this?

Comment 5

[Eugene Savitsky]

What I have noticed: bmwblog.com, pocketnow.com - those make high CPU usage.

And you have to use some 6-yo+ hardware.

Comment 6

[Wayne Mery (:wsmwk)]

(In reply to Eugene Savitsky from comment #5)
> What I have noticed: bmwblog.com, pocketnow.com - those make high CPU usage.
> 
> And you have to use some 6-yo+ hardware.

It would be great if you got specific about this hardware in bug 950396