Examine source code of Hide Files on GitHub

{
  "name": "Hide Files on GitHub",
  "version": "21.9.16",
  "description": "Hide nonessential files from the file browser",
  "homepage_url": "https://github.com/sindresorhus/hide-files-on-github",
  "manifest_version": 2,
  "minimum_chrome_version": "69",
  "applications": {
    "gecko": {
      "id": "hide-files-on-github@sindresorhus.com",
      "strict_min_version": "62.0"
    }
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png"
  },
  "permissions": [
    "https://github.com/*/*",
    "storage",
    "contextMenus",
    "activeTab"
  ],
  "optional_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://github.com/*/*"
      ],
      "exclude_matches": [
        "https://github.com/*/dotfiles*"
      ],
      "css": [
        "hide-files-on-github.css"
      ],
      "js": [
        "hide-files-on-github.js"
      ]
    }
  ]
}