Re: Identifying Firefox threads

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On 1/29/21 6:27 AM, Matthew Miller wrote:
On Fri, Jan 29, 2021 at 11:06:57AM +0000, Patrick O'Callaghan wrote:
I find that Firefox tends to slow down and consume more memory over
time, presumably because some tab is doing a lot of work. However the
usual process listings from 'top' or 'glances' just show a bunch of
fairly cryptic threads such as:

85.4   20.3  7.12G 3.11G    2704 poc         2h55:08 45    0 R 391K 0    /usr/lib64/firefox/firefox -contentproc -childID 5 -isForBrowser -prefsLen 291 -prefMapSize 29096
...
and so on, so it's hard to know which one is associated with which tab (or tabs).

Does anyone have a cheat sheet to help in pinning down the culprit(s)?

There's a weirdly-well kept secret — Firefox has its own built-in "top"!
Check this out:

about:performance

in the firefox toolbar.

That is a very well-kept secret. My usual method is to kill the process and see which tabs have the crash message on them. I expect I'll still have to do that, but at least I can find out exactly which tab in the group it was before I do.
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