Examine source code of notion-enhancer

{
  "manifest_version": 2,
  "name": "notion-enhancer",
  "version": "0.11.0.1",
  "author": "dragonwocky <thedragonring.bod@gmail.com> (https://dragonwocky.me/)",
  "description": "an enhancer/customiser for the all-in-one productivity workspace notion.so",
  "homepage_url": "https://notion-enhancer.github.io",
  "icons": {
    "16": "media/colour-x16.png",
    "32": "media/colour-x32.png",
    "48": "media/colour-x48.png",
    "128": "media/colour-x128.png",
    "256": "media/colour-x256.png",
    "512": "media/colour-x512.png"
  },
  "browser_action": {},
  "background": {
    "scripts": [
      "worker.js"
    ]
  },
  "options_ui": {
    "page": "repo/menu/menu.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "env/*",
    "api/*",
    "dep/*",
    "media/*",
    "repo/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.notion.so/*",
        "https://*.notion.site/*"
      ],
      "js": [
        "init.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "clipboardRead",
    "clipboardWrite",
    "unlimitedStorage"
  ]
}