Examine source code of Hackbar Future

{
  "manifest_version": 2,
  "name": "Hackbar Future",
  "version": "1.3.0",
  "description": "One of the best extensions for pentesters, the Hackbar, now in Firefox Quantum, but improved by 1000%, more features, more compact and visually remodeled.",
  "author": "Jalkhov",
  "homepage_url": "https://github.com/Jalkhov/hackbar-future",
  "developer": {
    "name": "Pedro Torcatt"
  },
  "icons": {
    "24": "img/iconx24.png",
    "32": "img/iconx32.png",
    "48": "img/iconx48.png",
    "128": "img/iconx128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "sidebar_action": {
    "default_icon": "img/iconx48.png",
    "default_title": "Hackbar Future",
    "default_panel": "panel.html"
  },
  "options_ui": {
    "page": "config.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "F1"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{269fbe3f-b3fb-40cc-a8c3-657943ae905c}"
    }
  }
}