Examine source code of Marklog

{
  "name": "Marklog.app",
  "version": "1.0.1",
  "manifest_version": 2,
  "description": "Marklog app extension allows you to upload new bookmarks easily to your account",
  "homepage_url": "https://marklog.app/",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/browser-polyfill.min.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "scripting",
    "http://*/*",
    "https://*/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0623af82-e619-4f34-987b-53ccc34f66d5}"
    }
  }
}