Examine source code of Contact Centre Helper

{
  "manifest_version": 2,
  "name": "Contact Centre Helper",
  "version": "2.0.1",
  "description": "All Rounded CC Helper",
  "browser_specific_settings": {
    "gecko": {
      "id": "mh2@ahmedbasem",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "commands": {
    "toggle-timer": {
      "suggested_key": {
        "default": "Alt+1"
      },
      "description": "Toggle timer"
    },
    "toggle-sheets": {
      "suggested_key": {
        "default": "Alt+2"
      },
      "description": "Toggle quick links"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "css": [
        "styles/theme.css",
        "styles/components.css",
        "features/timer/timer.css",
        "features/quicklinks/quick-links.css",
        "features/feed/feed-templates.css"
      ],
      "js": [
        "core/storage.js",
        "core/ui.js",
        "features/timer/timer.controller.js",
        "features/quicklinks/quick-links.controller.js",
        "features/contractor/open-portal.controller.js",
        "features/feed/feed-templates.controller.js"
      ]
    }
  ]
}