How to Access Chrome Camera and Mic Settings
If you want to block a website from accessing your mic or camera or allow a website to access either of them, you can do so under Chrome’s settings menu.
More Options for Site Settings
If you have multiple microphones or cameras, you can choose which one to use as the default device for Chrome using a drop-down menu next to the default listing. To block all access to your microphone (or camera), turn on the Don’t allow sites to use your microphone (or camera) option. You can manually set or block camera and microphone access for individual websites. Add them in the Custom behaviors section under Not allowed to use your camera (or microphone) or under Allowed to use your camera (or microphone). If you remove a website from the block list, it doesn’t move it to the allow list and vice versa. The same idea is valid for the list of allowed devices. Deleting a site there does not move it into the list of blocked sites.