Way to disable javascript notification when you focus away from browser window

[greg45416]

I sometimes have to do tasks where I am required to watch one or more pre-recorded videos. The page requires javascript to function, and the javascript detects if I focus away from the browser or move to another tab. Is there a way to disable this feedback so that I can move away from the page (either to another tab or another application) without the javascript being able to detect this?

Thanks in advance.

[Jon]

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[Anonymous]

This might help:  https://addons.mozilla.org/en-US/firefox/addon/always-visible/

[Anonymous]

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[Honza]

There is no such feature in DevTools designed for this. But you can use DevTools to e.g. play with 'visibilitychange' event to workaround your case (at least if the addon mentioned above doesn't help)

[greg45416]

@Anonymous@Honza- thank you! I can confirm that the always-visible extension works on the site like this that I will need to use next. I'll keep DevTools in mind as well for the next time that I need to use another such site.