Examine source code of Eye Protector-ff

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "2.4",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "icons": {
    "16": "images/icon.svg",
    "48": "images/icon.svg",
    "128": "images/icon.svg"
  },
  "action": {
    "default_icon": "images/icon.svg",
    "default_title": "__MSG_extName__",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "eye-protector-firefox@addons.local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/utility.js",
        "js/main.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "default_locale": "en"
}