Examine source code of LaterLinks

{
  "manifest_version": 2,
  "name": "LaterLinks - Save to Google Drive",
  "version": "1.0.7",
  "description": "Save links to your Google Drive for later access. All your bookmarks are stored in your personal Google Drive.",
  "permissions": [
    "activeTab",
    "storage",
    "identity",
    "https://www.googleapis.com/*",
    "https://api.dropboxapi.com/*",
    "https://content.dropboxapi.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "laterlinks@dci.dev",
      "strict_min_version": "109.0"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}