Examine source code of Github Streak

{
  "manifest_version": 2,
  "name": "github-streak-extension",
  "description": "Native GitHub Streak stats integration and Camo cache purger.",
  "version": "0.0.1",
  "icons": {
    "16": "assets/icons/fire-16.png",
    "32": "assets/icons/fire-32.png",
    "48": "assets/icons/fire-48.png",
    "128": "assets/icons/fire-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "*://github.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "github-streak@rahuldhole.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Default Popup Title",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "content-scripts/camo-purger.js",
        "content-scripts/profile-injector.js"
      ]
    },
    {
      "matches": [
        "*://*.google.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}