Examine source code of Star Notes

{
  "manifest_version": 2,
  "name": "Star Notes",
  "version": "2.0",
  "description": "Save the current page, along with your own notes.\n Export/Import JSON, and Export CSV. \n Generate and copy in text and bibliography references.",
  "icons": {
    "48": "icons/note-48.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "https://api.crossref.org/*"
  ],
  "browser_action": {
    "default_icon": "icons/note-48.png",
    "default_title": "Add/View Note",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f3191ddb-47ec-4a96-946c-655a1ff60b57}"
    }
  }
}