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One of the promoted advantages of Snap packages is the sandboxing-feature, where a Snap program may not be able to access as much system information as a package from the repository.

Now, I have read a lot about permission problems with Snap software and how to fix them, but I don't know where to find actual information on what permissions a specific Snap package has.

The Snapcraft-website is also very brief about this.

As one concrete example: How can I find out what permissions the Discord Snap gets and (how) am I able to modify those permissions to basically only allow Pulseaudio/microphone access? (Because that's all it needs to have.)

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    Sorry in advance as I'm new to Ubuntu. Is this the documentation you're looking for- snapcraft.io/docs/interface-management . I don't currently have Ubuntu installed but last I remember I was also able to enable/disable snap permissions through the pre-installed Store app.
    – HattinGokbori87
    Jan 30, 2020 at 23:56

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Thanks to the link above to the documentation, I found this command to enable microphone access to the new chromium snap:

snap connections chromium  # to list existing permissions
sudo snap connect chromium:audio-record :audio-record  # to enable

The app must be restarted for new permissions to take effect.

(I'm not happy it took this long to find the answer, nor how obtuse the docs are.)

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    Don't forget to restart chromium browser after changing permission.
    – Tombart
    Mar 11, 2020 at 8:45

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