Examine source code of Web Insights

{
  "manifest_version": 2,
  "name": "Web Insights",
  "version": "1.5.1",
  "description": "Allows to intercept and send http and https requests on any website",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "background": {
    "scripts": [
      "js/bg.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "match_about_blank": true,
      "run_at": "document_start",
      "js": [
        "js/content.js"
      ]
    }
  ],
  "devtools_page": "devtools.html",
  "permissions": [
    "tabs",
    "<all_urls>"
  ]
}