Examine source code of Curius

{
  "name": "Curius",
  "version": "0.2.8.23",
  "description": "Learn together",
  "manifest_version": 2,
  "permissions": [
    "contextMenus",
    "tabs",
    "storage",
    "cookies",
    "http://*/",
    "https://*/"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "options_page": "options.html",
  "browser_action": {
    "default_icon": "dist/extension/static/icon.png",
    "default_popup": "extension.html"
  },
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+S"
      }
    },
    "save-link": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description": "Saves the link"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "http://localhost/*",
        "*://www.messenger.com/*"
      ],
      "css": [
        "dist/extension/static/content.css"
      ],
      "js": [
        "dist/helper.js"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self' https://apis.google.com; object-src 'self'",
  "icons": {
    "128": "dist/extension/static/saved.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hi@curius.app"
    }
  }
}