Examine source code of GitHub Original Streak

{
  "name": "Github Original Streak",
  "short_name": "Github Streak",
  "version": "1.15.0",
  "version_name": "1.15.0",
  "manifest_version": 2,
  "description": "Re-builds former current and longest streaks on Github profiles",
  "homepage_url": "https://github.com/Naramsim/GithubOriginalStreak",
  "author": "Naramsim",
  "icons": {
    "16": "icons/g16.png",
    "48": "icons/g48.png",
    "128": "icons/g128.png"
  },
  "default_locale": "en",
  "offline_enabled": true,
  "permissions": [
    "*://github.com/*",
    "*://api.github.com/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "js": [
        "src/inject.js"
      ]
    }
  ]
}