Examine source code of Black Menu for Wikipedia

{
  "manifest_version": 2,
  "version": "7.0.0",
  "name": "Black Menu for Wikipedia",
  "short_name": "Menu for Wiki",
  "description": "__MSG_cj_i18n_02127__",
  "author": "Carlos Jeurissen",
  "homepage_url": "https://apps.jeurissen.co/black-menu-for-wikipedia",
  "developer": {
    "name": "Carlos Jeurissen",
    "url": "https://apps.jeurissen.co/"
  },
  "default_locale": "en",
  "content_security_policy": "default-src 'none'; child-src 'none'; manifest-src 'none'; media-src 'none'; object-src 'none'; worker-src 'none'; connect-src 'none'; font-src 'none'; frame-src https://*.org/; img-src data:; script-src 'self'; script-src-elem 'self'; script-src-attr 'none'; style-src 'self'; style-src-elem 'self'; style-src-attr 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; block-all-mixed-content; upgrade-insecure-requests; report-uri https://api.jeurissen.co/reports/csp/webext/bmfw/",
  "offline_enabled": true,
  "browser_specific_settings": {
    "gecko": {
      "id": "black-menu-for-wikipedia@carlosjeurissen.com"
    }
  },
  "externally_connectable": {
    "accepts_tls_channel_id": false
  },
  "icon_variants": [
    {
      "16": "/images/icon-16.png",
      "32": "/images/icon-32.png",
      "48": "/images/icon-48.png",
      "128": "/images/icon-128.png"
    }
  ],
  "permissions": [
    "storage",
    "sidePanel",
    "https://*.mediawiki.org/*",
    "https://*.wikibooks.org/*",
    "https://*.wikidata.org/*",
    "https://*.wikimedia.org/*",
    "https://*.wikinews.org/*",
    "https://*.wikipedia.org/*",
    "https://*.wikiquote.org/*",
    "https://*.wikisource.org/*",
    "https://*.wikiversity.org/*",
    "https://*.wikivoyage.org/*",
    "https://*.wiktionary.org/*"
  ],
  "background": {
    "page": "/views/background.html",
    "persistent": false
  },
  "side_panel": {
    "default_path": "/views/sidebar.html"
  },
  "sidebar_action": {
    "browser_style": false,
    "mobile_user_agent": false,
    "open_at_install": false,
    "use_navigation_bar": false,
    "default_page": "/views/sidebar.html",
    "default_panel": "/views/sidebar.html",
    "default_icon": {
      "16": "/images/icon-16.png",
      "19": "/images/icon-19.png",
      "32": "/images/icon-32.png",
      "38": "/images/icon-38.png",
      "48": "/images/icon-48.png"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "description": "__MSG_cj_i18n_03789__"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "/styles/cs-main.css"
      ],
      "js": [
        "/scripts/cs-main.js"
      ],
      "matches": [
        "https://*.mediawiki.org/*",
        "https://*.wikibooks.org/*",
        "https://*.wikidata.org/*",
        "https://*.wikimedia.org/*",
        "https://*.wikinews.org/*",
        "https://*.wikipedia.org/*",
        "https://*.wikiquote.org/*",
        "https://*.wikisource.org/*",
        "https://*.wikiversity.org/*",
        "https://*.wikivoyage.org/*",
        "https://*.wiktionary.org/*"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "/images/icon-16.png",
    "32": "/images/icon-32.png",
    "48": "/images/icon-48.png",
    "128": "/images/icon-128.png"
  },
  "browser_action": {
    "browser_style": false,
    "default_area": "navbar",
    "pin_by_default": true,
    "icon_variants": [
      {
        "16": "/images/icon-16.png",
        "19": "/images/icon-19.png",
        "32": "/images/icon-32.png",
        "38": "/images/icon-38.png",
        "48": "/images/icon-48.png"
      }
    ],
    "default_popup": "/views/popup.html",
    "default_icon": {
      "16": "/images/icon-16.png",
      "19": "/images/icon-19.png",
      "32": "/images/icon-32.png",
      "38": "/images/icon-38.png",
      "48": "/images/icon-48.png"
    }
  },
  "applications": {
    "gecko": {
      "id": "black-menu-for-wikipedia@carlosjeurissen.com"
    }
  }
}