Examine source code of FocusMode

{
  "manifest_version" : 3 ,
  "name" : "__MSG_extensionName__" ,
  "description" : "__MSG_extensionDescription__" ,
  "version" : "1.0.1",
  "default_locale" : "en" ,
  "browser_specific_settings": {
    "gecko": {
      "id": "focusmode@abdalsalaam.dev",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions" : [
    "storage" ,
    "declarativeNetRequest" 
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "background" : {
    "scripts" : [
      "shared/settings.js" ,
      "background/background.js" 
    ]
  },
  "options_ui" : {
    "page": "pages/options/options.html" ,
    "open_in_tab": true
  },
  "action" : {
    "default_popup" : "popup/popup.html",
    "default_icon" : {
      "48" : "icons/icon-48.png",
      "96" : "icons/icon-96.png"
    }
  },
  "icons" : {
    "48" : "icons/icon-48.png",
    "96" : "icons/icon-96.png",
    "128" : "icons/icon-128.png"
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "pages/blocked/blocked.html" 
      ],
      "matches" : [
        "<all_urls>" 
      ]
    }
  ],
  "content_scripts" : [
    {
      "matches" : [
        "*://*.facebook.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/facebook.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "*://*.x.com/*" ,
        "*://*.twitter.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/x.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "*://*.instagram.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/instagram.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "*://*.reddit.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/reddit.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "*://*.linkedin.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/linkedin.js" 
      ],
      "run_at" : "document_idle" 
    },
    {
      "matches" : [
        "*://*.youtube.com/*" 
      ],
      "js" : [
        "shared/settings.js" ,
        "content/engine.js" ,
        "content/adapters/youtube.js" 
      ],
      "run_at" : "document_idle" 
    }
  ]
}