Examine source code of HAR/JSON viewer

{
  "manifest_version": 2,
  "name": "HAR/JSON viewer",
  "description": "Visualizes HTTP Archive (HAR) files opened locally or online. Also features JSON tree view for HAR and any structured JSON files.",
  "version": "1.3.0",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon-colored-16.png",
    "32": "icon-colored-32.png",
    "64": "icon-colored-64.png",
    "128": "icon-colored-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icon-colored-16.png",
      "32": "icon-colored-32.png"
    },
    "default_title": "HAR/JSON viewer"
  },
  "web_accessible_resources": [
    "harviewer/*",
    "connection.js"
  ]
}