Examine source code of threatmap

{
  "name": "w3security-bar",
  "version": "0.5.0",
  "description": "The all in one Red team extension for web pentester",
  "browser_action": {
    "default_title": "W3Security-bar",
    "default_popup": "index.html",
    "default_icon": {
      "16": "./src/assets/img/icons/get_started16.png",
      "32": "./src/assets/img/icons/get_started32.png",
      "48": "./src/assets/img/icons/get_started48.png",
      "128": "./src/assets/img/icons/get_started128.png"
    }
  },
  "icons": {
    "16": "./src/assets/img/icons/get_started16.png",
    "32": "./src/assets/img/icons/get_started32.png",
    "48": "./src/assets/img/icons/get_started48.png",
    "128": "./src/assets/img/icons/get_started128.png"
  },
  "manifest_version": 2,
  "devtools_page": "devtools.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{02e992da-a150-4cee-99f5-9f9c47bcefb5}"
    }
  }
}