Examine source code of Bullet Journal

{
  "name": "Bullet Journal",
  "description": "Note taking extension to jot down quick thoughts or to save longer notes ",
  "version": "1.0.1",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Bullet Journal"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "icons": {
    "16": "journal.png",
    "48": "journal.png",
    "128": "journal.png"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e599ecc-9d9e-486e-84d9-efc65818b4a8}"
    }
  }
}