Examine source code of Chorus - Spotify Enhancer

{
  "manifest_version": 3,
  "name": "Chorus - Spotify Enhancer",
  "description": "Enhance Spotify with controls to save favourite snips, auto-skip tracks, and set global and custom speed. More to come!",
  "version": "2.9.0",
  "short_name": "chorus",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/media-override.js",
        "/router.js",
        "/icon/*",
        "/sounds/*",
        "/processor.js",
        "/ms-processor.js",
        "/soundtouch.js",
        "/content-scripts/*.css"
      ],
      "matches": [
        "*://open.spotify.com/*"
      ]
    }
  ],
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "scripting",
    "unlimitedStorage",
    "webRequest",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "chorus@cdrani.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "host_permissions": [
    "*://*.spotify.com/*"
  ],
  "commands": {
    "on/off": {
      "description": "Toggle Extension On/Off"
    },
    "loop": {
      "description": "Loop/UnLoop Snip/Track"
    },
    "next": {
      "description": "Next Track"
    },
    "play/pause": {
      "description": "Play/Pause"
    },
    "repeat": {
      "description": "Repeat Track"
    },
    "shuffle": {
      "description": "Shuffle Tracks"
    },
    "previous": {
      "description": "Previous Track"
    },
    "settings": {
      "description": "Display Controls"
    },
    "mute/unmute": {
      "description": "Mute/Unmute Track"
    },
    "seek-forward": {
      "description": "Seek Track Forwards"
    },
    "save/unsave": {
      "description": "Save/Unsave Track"
    },
    "seek-rewind": {
      "description": "Seek Track Backwards"
    },
    "block-track": {
      "description": "Add track to block list"
    },
    "show-track": {
      "description": "Show current track as a notification"
    },
    "toggle-new-releases": {
      "description": "Toggle New Releases UI"
    },
    "toggle-config": {
      "description": "Toggle Chorus Config UI"
    },
    "audio-preset-1": {
      "description": "Audio Preset 1"
    },
    "audio-preset-2": {
      "description": "Audio Preset 2"
    },
    "audio-preset-3": {
      "description": "Audio Preset 3"
    },
    "audio-preset-4": {
      "description": "Audio Preset 4"
    },
    "audio-preset-5": {
      "description": "Audio Preset 5"
    },
    "cycle-theme-next": {
      "description": "Cycle Theme Next"
    },
    "cycle-theme-previous": {
      "description": "Cycle Theme Previous"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "chorus - spotify enhancer",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://open.spotify.com/*"
      ],
      "css": [
        "content-scripts/chorus.css"
      ],
      "js": [
        "content-scripts/chorus.js"
      ]
    }
  ]
}