Examine source code of Old Reddit Viewer

{
  "manifest_version": 2,
  "name": "Old Reddit Viewer",
  "version": "1.1.8",
  "description": "Allows users to redirect to old.reddit.com when on a reddit page",
  "author": "Jack Philippi <github.com/fippi>",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "http://*/*",
    "https://*/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.reddit.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "icon.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f9c5e79-2c56-4d79-9021-48619ea17132}",
      "strict_min_version": "42.0"
    }
  }
}