Examine source code of Leadsolo LinkedIn Plugin

{
  "browser_action": {
    "default_popup": "leadsolo.html",
    "default_title": "Leadsolo LinkedIn Plugin"
  },
  "description": "Leadsolo",
  "manifest_version": 2,
  "name": "Leadsolo LinkedIn Plugin",
  "permissions": [
    "activeTab",
    "https://leadsolo.io/*"
  ],
  "version": "2.5",
  "icons": {
    "16": "leadsolo-linkedin-logo.png",
    "48": "leadsolo-linkedin-logo.png",
    "128": "leadsolo-linkedin-logo.png"
  }
}