Examine source code of Auto Bookmark History

{
  "manifest_version": 2,
  "name": "Auto Bookmark History",
  "version": "0.1.1",
  "description": "automatically bookmark pages that match a set URL",
  "background": {
    "scripts": [
      "out/bg.js"
    ],
    "type": "module"
  },
  "action": {},
  "options_ui": {
    "page": "pages/options/index.html"
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "permissions": [
    "storage",
    "bookmarks",
    "history"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{62cb17e7-f9e4-4302-a761-c72336632b69}"
    }
  }
}