Examine source code of Configure PyPi-Fields

{
  "manifest_version": 2,
  "name": "Configure PyPi-Fields",
  "version": "1.1",
  "icons": {
    "32": "popup/icon.svg",
    "64": "popup/icon.svg"
  },
  "author": "Hazel Noack",
  "homepage_url": "https://github.com/hazel-noack/pypi-fields-extention",
  "summary": "Adds a field, to copy dependencies directly from PyPi.",
  "description": "Adds a field, to copy dependencies directly from PyPi.",
  "categories": [
    "productivity",
    "utilities"
  ],
  "screenshots": [
    {
      "src": "screenshots/extension.png",
      "sizes": "1110x514",
      "type": "image/png",
      "form_factor": "wide",
      "label": "showing the extension"
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@pypi-copy-dependencies"
    }
  },
  "browser_action": {
    "default_icon": "popup/icon.svg",
    "default_title": "PyPi copy dependency",
    "default_popup": "popup/config.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://pypi.org/project/*",
        "*://test.pypi.org/project/*"
      ],
      "js": [
        "content_scripts/add_fields.js"
      ]
    }
  ]
}