Examine source code of Apollo Inspector

{
  "manifest_version": 2,
  "name": "Apollo Inspector",
  "description": "Adds apollo inspector devtools to Firefox",
  "version": "0.0.4",
  "content_scripts": [
    {
      "js": [
        "content-script.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "devtools_page": "devtools.html",
  "web_accessible_resources": [
    "webpage.js"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{788b2dbb-f9f2-4d56-bc4c-66647e6478bc}"
    }
  }
}