Examine source code of SuperHelp

{
  "manifest_version": 2,
  "name": "SuperHelp",
  "version": "1.2",
  "permissions": [
    "activeTab"
  ],
  "description": "A helpful extension, developed by the HC Team, ready to make your life easier when dealing with CSS in Superset. Long life to he capybara!",
  "icons": {
    "16": "/src/img/capi_16.png",
    "32": "/src/img/capi_32.png",
    "128": "/src/img/capi_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/superset/dashboard/*"
      ],
      "js": [
        "./src/js/modify.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "/src/img/capi_128.png",
    "default_title": "SuperHelp!",
    "default_popup": "/src/html/popup.html"
  },
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{0937a496-845d-473d-9f20-ad67a3702daf}"
    }
  }
}