I cannot observe the problem here. I tested in virtual machines, 18.04
and 19.10, version 70.0.1 from the Ubuntu archive in both, and played
with different values for the gain in your JSFiddle. When setting the
value to 0 there is no sound to be heard.
Can you please run "apport-collect 1852645" ?
** Changed in: firefox (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1852645
Title:
WebAudio API does not behave as expected (Cannot mute videos)
Status in firefox package in Ubuntu:
Incomplete
Bug description:
I initially posted this bug to the Firefox issue tracker here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1596397, but we
determined it was specific to the Ubuntu package.
When I play the video in this JSFiddle:
https://jsfiddle.net/ea9h3bg7/, there should be no audio. This is the
behavior in the Firefox 70 build that you can get from Mozilla's
website. However, with the Ubuntu build, audio is still heard.
---
Ubuntu 19.10, Firefox that shipped with the distro, upgraded to 70.0.1
via the Ubuntu update manager.
Firefox package version:
firefox:
Installed: 70.0.1+build1-0ubuntu0.19.10.1
Candidate: 70.0.1+build1-0ubuntu0.19.10.1
Version table:
*** 70.0.1+build1-0ubuntu0.19.10.1 500
500 http://fr.archive.ubuntu.com/ubuntu eoan-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu eoan-security/main amd64
Packages
100 /var/lib/dpkg/status
69.0.3+build1-0ubuntu1 500
500 http://fr.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
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