Examine source code of PagePouch

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.2.0",
  "default_locale": "en",
  "chrome_url_overrides": {
    "newtab": "./src/newtab/index.html"
  },
  "browser_action": {
    "default_icon": "./favicon.svg",
    "default_title": "add to pouch",
    "default_popup": "./src/popup/index.html"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{861bfeb0-4075-4f49-a3b4-72c3938dfa0e}"
    }
  }
}