Examine source code of Ammit

{
  "manifest_version" : 3 ,
  "name" : "Ammit",
  "version" : "0.7.2",
  "description" : "__MSG_appDesc__" ,
  "default_locale" : "en" ,
  "browser_specific_settings": {
    "gecko": {
      "id": "ammit@nolicen.se",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "websiteContent",
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions" : [
    "storage" ,
    "alarms" ,
    "declarativeNetRequest" ,
    "scripting" 
  ],
  "host_permissions" : [
    "https://music.youtube.com/*" ,
    "https://open.spotify.com/*" ,
    "https://spclient.wg.spotify.com/*" ,
    "https://musicbrainz.org/*" ,
    "https://raw.githubusercontent.com/*" ,
    "https://gist.githubusercontent.com/*" 
  ],
  "background" : {
    "scripts" : [
      "src/config.js" ,
      "src/background.js" 
    ]
  },
  "content_scripts" : [
    {
      "matches" : [
        "https://music.youtube.com/*" 
      ],
      "js" : [
        "src/heuristics.js" ,
        "src/widget.js" ,
        "src/content.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "https://open.spotify.com/*" 
      ],
      "js" : [
        "src/spotify-main.js" 
      ],
      "world" : "MAIN" ,
      "run_at" : "document_start" 
    },
    {
      "matches" : [
        "https://open.spotify.com/*" 
      ],
      "js" : [
        "src/heuristics.js" ,
        "src/widget.js" ,
        "src/spotify-content.js" 
      ],
      "run_at" : "document_idle" 
    }
  ],
  "web_accessible_resources" : [
    {
      "resources" : [
        "data/blocklist.json" 
      ],
      "matches" : [
        "https://music.youtube.com/*" 
      ]
    }
  ],
  "icons" : {
    "16" : "icons/16.png",
    "32" : "icons/32.png",
    "48" : "icons/48.png",
    "128" : "icons/128.png"
  },
  "action" : {
    "default_title" : "Ammit",
    "default_popup" : "popup.html",
    "default_icon" : {
      "16" : "icons/16.png",
      "32" : "icons/32.png",
      "48" : "icons/48.png",
      "128" : "icons/128.png"
    }
  }
}