Examine source code of Hoarder App (unofficial)

{
  "manifest_version": 2,
  "name": "Hoarder App",
  "version": "1.2.0",
  "description": "Extension for https://github.com/hoarder-app/hoarder",
  "icons": {
    "48": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "hoard": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description": "Save current page to Hoarder"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "notifications",
    "bookmarks"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Hoarder App",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ba55486-2dcb-467e-80f6-aa8c042b219d}"
    }
  }
}