Examine source code of Slumber

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.1.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "uk",
  "author": "Scooby-Doooo",
  "homepage_url": "https://github.com/Scooby-Doooo/sleep_tab",
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "notifications"
  ],
  "background": {
    "scripts": [
      "src/utils/storage.js",
      "src/utils/i18nOverride.js",
      "src/utils/tabManager.js",
      "src/background/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "__MSG_popupTitle__"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "slumber-tab-manager@github.scooby-doooo",
      "strict_min_version": "79.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self';"
}