Disallow volume changes via Javascript
Categories
(Core :: Audio/Video: Playback, enhancement)
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People
(Reporter: jengelh, Unassigned)
Details
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0
Steps to reproduce:
Using a Linux system with Pipewire, visit some video pages and start playback. Be sure to set the volume to 100% using the slider on the video. Now inspect the HTML5 <video> element, e.g. using the F12 Developer Console, for the actual volume level.
Now observe this:
for https://www.youtube.com/watch?v=WsaCXltg-K8 , the volume as the DOM knows it is: 0.6614545222535068
for https://www.youtube.com/watch?v=IskTIty19Tw , the volume is 0.7943282347242815
for https://www.youtube.com/watch?v=zppfjeculUs , the volume is
1.0
(The float values seem consistent within each video, irrespective of YT's "Stable volume" feature being turned on or off.) So, Youtube apparently sets a volume that is possibly lower than 1.
To get ahold of this behavior, I would like to see the introduction of some knob (possibly in about:config) to suppress volume changes issued by DOM element change events / Javascript entirely.
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Comment 1•1 year ago
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The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.
Description
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