Examine source code of GitHub Copy Raw

{
  "manifest_version": 2,
  "name": "GitHub Copy Raw",
  "version": "1.0",
  "description": "Adds a button for copying the raw content of a file to GitHub",
  "homepage_url": "https://github.com/schollsebastian/GitHub-Copy-Raw-Extension#readme",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "permissions": [
    "clipboardWrite",
    "https://raw.githubusercontent.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "src/copy-button.js"
      ]
    }
  ]
}