Examine source code of The Commenter

{
  "manifest_version": 2,
  "name": "The Commenter",
  "version": "1.2",
  "description": "Searches the comments for the current tab's url",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "*://hn.algolia.com/*",
    "*://www.reddit.com/*"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "48": "icons/48.png",
      "96": "icons/96.png"
    },
    "default_title": "The commenter",
    "default_popup": "popup/commenter.html"
  },
  "background": {
    "scripts": [
      "./dist/bundle.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "commenter.extension@viorel.me"
    }
  }
}