Examine source code of Comic Ninja

{
  "manifest_version": 2,
  "name": "Comic Ninja",
  "version": "1.0.3",
  "description": "Dedicated webcomic reader for Firefox",
  "author": "Comic Ninja",
  "homepage_url": "https://comicninja.co.uk",
  "browser_specific_settings": {
    "gecko": {
      "id": "comicninja@comicninja.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "src/assets/icons/icon-16.png",
    "32": "src/assets/icons/icon-32.png",
    "48": "src/assets/icons/icon-48.png",
    "128": "src/assets/icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "alarms",
    "activeTab",
    "tabs",
    "theme",
    "notifications",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/background/helpers.js",
      "src/background/parser.js",
      "src/background/fetcher.js",
      "src/background/storage.js",
      "src/background/background.js"
    ]
  },
  "sidebar_action": {
    "default_title": "Comic Ninja",
    "default_panel": "src/sidebar/landing.html",
    "default_icon": {
      "16": "src/assets/icons/icon-16.png",
      "32": "src/assets/icons/icon-32.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content/reader.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "src/styles/output.css"
  ],
  "browser_action": {
    "default_title": "Comic Ninja",
    "default_icon": {
      "16": "src/assets/icons/icon-16.png",
      "32": "src/assets/icons/icon-32.png",
      "48": "src/assets/icons/icon-48.png"
    }
  }
}