Examine source code of SSLeuth

{
  "manifest_version": 2,
  "name": "SSLeuth",
  "version": "1.7.1",
  "description": "Displays connection and certificate details for the current page.",
  "author": "mcortt",
  "icons": {
    "16": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icons/icon.svg",
    "default_title": "View Certificate",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ssleuth@certs"
    }
  }
}