Examine source code of Roam Toolkit

{
  "name": "Roam Toolkit",
  "author": "roam-unofficial",
  "version": "0.5.3",
  "description": "Roam force multiplier",
  "icons": {
    "128": "assets/icon-128.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "clipboardRead",
    "clipboardWrite",
    "*://roamresearch.com/*"
  ],
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Roam Toolkit",
    "default_icon": "assets/icon-48.png",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "js": [
        "entry.js"
      ],
      "matches": [
        "*://roamresearch.com/*"
      ]
    }
  ]
}