Examine source code of Awesome Mute Tab

{
  "manifest_version": 3,
  "name": "Awesome Mute Tab",
  "version": "1.1",
  "description": "Mutes or unmutes the active tab when clicking the toolbar icon.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Awesome Mute Tab",
    "default_icon": "unmuted.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "awesome-mute-tab@majamikunil.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}