Examine source code of StresStimulus Recorder

{
  "manifest_version": 2,
  "name": "StresStimulus Recorder",
  "version": "1.0.6",
  "description": "Record web traffic for exporting to StresStimulus performance testing tool",
  "background": {
    "scripts": [
      "utils/utils.js",
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.stresstimulus.com/start-browser-recording*"
      ],
      "run_at": "document_start",
      "js": [
        "utils/utils.js",
        "content_script/content_script.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "nativeMessaging",
    "tabs",
    "<all_urls>"
  ],
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@stresstimulus.com",
      "strict_min_version": "58.0"
    }
  }
}