Muzzle is a simple Mac app to silence embarrassing notifications while screensharing (with the best landing page of all time).
Mute Intercom is a free Chrome extension that blocks annoying notification sounds from Intercom widgets.
AutoMute for Google Chrome is an extension that automatically mutes each new tab the instant it is opened.
Browser extensions which block overly-eager permission requests for notifications, location, etc. For example, ones that happen before you've interacted with the page. This was created as part of 'How to improve your permissions UX' (https://adamlynch.com/improve-permissions-ux).
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