Ubuntu – Monitoring CPU% of Tabs in Firefox

firefoxlinuxmonitoringUbuntu

Sometimes, when I have numerous tabs open in Firefox, one of those tabs will start consuming a lot of CPU%, and I want to know which tab is the culprit. Doing this is a very manual process for which I'd like to find automation.

I wish I had an application that could monitor firefox exclusively in a manner that produces concise output of only the firefox-facts I want to know.

I'm looking for a command/application that will list the processes of each tab running in firefox filtered to only include the following info for each tab-process:

Process ID
Webpage Address of Tab
CPU % usage
Memory used

Additionally, I'd like the info sorted by CPU % descending.

Basically, I hoping there exists a program like htop, but that's exclusively dedicated to just the pertinent stuff I want to monitor in Firefox (while leaving out all the details I don't care about).

Best Answer

You can type about:performance in the address bar of firefox. Then you will get a table where there will be pid of each tab of firefox with Resident Set size and Unique Set Size. And below this there will be some lines explaining the performance of each tab (like performing well) and if a tab is not performing well then it will show there and you can close that tab from there using the Close Tab option.

Related Solutions

Finding session information about Firefox

How about you read /home/*/.mozilla/firefox/*/sessionstore.js?

Run ‘top’ Command Once and Exit – How to Guide

In Linux, you can try this:

top -bn1 > output.txt

From man top:

-b : Batch-mode operation
            Starts top in 'Batch' mode, which could be useful for sending
            output from top to other programs or  to  a  file.   In  this
            mode, top will not accept input and runs until the iterations
            limit you've set with the '-n' command-line option  or  until
            killed.
....
-n : Number-of-iterations limit as:  -n number
            Specifies  the  maximum  number of iterations, or frames, top
            should produce before ending.

With OS X, try:

top -l 1

From top OSX manpage:

 -l <samples>
              Use logging mode and display <samples> samples, even if 
              standard output is a terminal. 0 is treated  as  infinity.   
              Rather than redisplaying, output is periodically printed in 
              raw form. Note that the first sample displayed will have an 
              invalid %CPU displayed for each process,  as it is calculated 
              using the delta between samples.

Best Answer

Related Solutions

Finding session information about Firefox

Run ‘top’ Command Once and Exit – How to Guide

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