Examine source code of Robot Helper

{
  "manifest_version": 2,
  "name": "RobotHelper",
  "version": "0.5.0",
  "description": "A Robot that records user action and scans the page to generate RobotFramework test scripts (beta)",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "background": {
    "scripts": [
      "./src/constants.js",
      "./src/translator/robot-translator.js",
      "./src/background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "@robothelper",
      "strict_min_version": "57.0"
    }
  },
  "options_ui": {
    "page": "./src/options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./src/locator/xpath-locator.js",
        "./src/locator/tree-builder.js",
        "./src/locator/classifier.js",
        "./src/locator/scanner.js",
        "./src/content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_icon": "assets/icon-stop.png",
    "default_popup": "src/popup.html"
  },
  "icons": {
    "16": "assets/logo-16.png",
    "32": "assets/logo-32.png",
    "48": "assets/logo-48.png",
    "128": "assets/logo-128.png"
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "downloads",
    "storage"
  ]
}