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How can I stop firefox from lowering the volume of a tab when a new tab tries to play sounds?

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I sometimes browse while a video is playing in the background on another tab. Recent versions of firefox have an annoying habit of drastically reducing the volume of older tabs when a new tab tries to play sounds, such as a video ad. Even after closing the new tab, the volume does not reset. Sometimes I can get the volume back to normal by muting the tab, adjusting the plugin volume slider, then unmuting the tab, but it doesn't always work. I would like to be able to disable this feature, even if it means multiple audio sources are playing at full volume at once. Any ideas?

I sometimes browse while a video is playing in the background on another tab. Recent versions of firefox have an annoying habit of drastically reducing the volume of older tabs when a new tab tries to play sounds, such as a video ad. Even after closing the new tab, the volume does not reset. Sometimes I can get the volume back to normal by muting the tab, adjusting the plugin volume slider, then unmuting the tab, but it doesn't always work. I would like to be able to disable this feature, even if it means multiple audio sources are playing at full volume at once. Any ideas?

Chosen solution

There is a Windows setting that I think could be related to this problem. Could you check this article to see whether Firefox is triggering Windows 7's Communications app feature?

How to Prevent Windows from Automatically Reducing System Volume

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For additional information, I'm running Firefox 57.0.4 on Windows 7.

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Go to the Mozilla Add-ons Web Page {web Link} (There’s a lot of good stuff here) and search for a good ad / pop-up blocker.

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I was using ads as an example. Any sound on a new tab will lower the volume on other tabs.

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Seçilmiş Həll

There is a Windows setting that I think could be related to this problem. Could you check this article to see whether Firefox is triggering Windows 7's Communications app feature?

How to Prevent Windows from Automatically Reducing System Volume

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Seems to have worked. Ironically, the article page actually reduced the volume of a stream I was watching. Worked as a test, at least, once I changed the settings. Thanks.