JavaScript Toggle On and Off (WebExtension)

manifest.json

{
  "name": "JavaScript Toggle On and Off",
  "description": "__MSG_app_description__",
  "version": "0.2.4",
  "manifest_version": 2,
  "default_locale": "en",
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "notifications"
  ],
  "browser_action": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "homepage_url": "https://add0n.com/javascript-toggler.html",
  "icons": {
    "16": "data/icons/16.png",
    "18": "data/icons/18.png",
    "19": "data/icons/19.png",
    "32": "data/icons/32.png",
    "36": "data/icons/36.png",
    "38": "data/icons/38.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png"
  },
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "commands": {
    "toggle-javascript-engine": {
      "suggested_key": {
        "default": "Alt+Shift+L"
      },
      "description": "Toggle JavaScript Engine"
    }
  },
  "applications": {
    "gecko": {
      "id": "{479f0278-2c34-4365-b9f0-1d328d0f0a40}",
      "strict_min_version": "57.0"
    }
  }
}