Masterlingo - Learn languages as you scroll

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "short_name": "Masterlingo",
  "name": "Masterlingo - Learn languages as you scroll",
  "description": "Flashcards that are always with you, anywhere on the web.",
  "version": "1.0.3",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "/static/js/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "/static/img/icon16.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "/static/css/content.css"
      ],
      "js": [
        "/static/js/content.js"
      ]
    }
  ],
  "icons": {
    "16": "/static/img/icon16.png",
    "48": "/static/img/icon48.png",
    "128": "/static/img/icon128.png"
  },
  "web_accessible_resources": [
    "/static/css/styles.css",
    "/static/img/*"
  ],
  "content_security_policy": "script-src 'self' 'sha256-GgRxrVOKNdB4LrRsVPDSbzvfdV4UqglmviH9GoBJ5jk='; object-src 'self'",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs"
  ],
  "externally_connectable": {
    "matches": [
      "https://masterlingo.app/*"
    ]
  }
}