Examine source code of Piwik PRO Tracking Helper

{
  "manifest_version": 2,
  "name": "Piwik PRO Tracking Helper",
  "description": "Inspect commands sent to the browser tracker and outgoing network events",
  "version": "0.0.17",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Piwik PRO Tracking Helper",
    "default_popup": "popup.html"
  },
  "devtools_page": "devtools.html",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/collector.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/messageForwarder.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a5a2b80-6d1c-4f6d-a242-0578ff248754}"
    }
  }
}