Examine source code of Reddit User Vibe

{
  "manifest_version": 2,
  "name": "Reddit User Vibe",
  "version": "2.0.0",
  "description": "Get an instant vibe of who's commenting. View their top subreddits in a glance.",
  "permissions": [
    "storage",
    "https://www.reddit.com/*",
    "https://old.reddit.com/*",
    "https://arctic-shift.photon-reddit.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.reddit.com/*",
        "https://old.reddit.com/*"
      ],
      "js": [
        "config.js",
        "storage.js",
        "api.js",
        "ui.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-snark-detector@extension",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}