Examine source code of Github Just Download

{
  "manifest_version": 2,
  "name": "Github Just Download",
  "version": "1.0.0",
  "description": "Adds a download file button",
  "icons": {
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "https://github.com/*/blob/*/*"
      ],
      "js": [
        "dist/main.bundle.js"
      ],
      "exclude_matches": [
        "https://github.com/"
      ]
    }
  ],
  "permissions": [
    "https://github.com/*/blob/*/*"
  ]
}