Something is keeping my X awake

[martin f krafft]

Regarding the following, written by "Vladimir Dergachev" on 2022-07-21 at 17:28 Uhr -0400:
>If any of such programs were terminated before they could restore 
>the regular behaviour, the screen won't lock.

Nah, the problem is different. If I run `xscreensaver-command 
-lock`, then the screen locks, but every few minutes, the password 
screen will pop up, and time out, as if someone moves the mouse 
every few minutes.

As Carsten suggested, it seems that it's Firefox. I've quit the 
browser, and now `xset q` reports "Monitor is Off" (logged in over 
SSH), which it hasn't done in a long time.

This of course now begs the question: what is the browser doing to 
keep X awake by jiggling XScreensaver regularly, and worse yet: 
preventing DPMS shutoff. I am not watching videos, but I do havem 
plenty open tabs. Is any one of them able to keep my screen busy 
like this?

And how can I disable that? I generally keep the browser running, 
and don't want to have to shut it down every time I want to save 
energy and screen lifetime during idle periods.

A [web search](https://search.brave.com/search?q=firefox+dpms) seems 
to only touch the opposite problem, i.e. people seeking to disable 
DPMS from Firefox.

Thanks!

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