Examine source code of ISImprovements

{
  "name": "ISImprovements",
  "version": "1.30",
  "manifest_version": 2,
  "description": "An extension for improving IS.",
  "icons": {
    "16": "logo.png",
    "48": "logo.png",
    "128": "logo.png"
  },
  "browser_action": {
    "default_icon": "logo.png",
    "default_title": "IS Improvements"
  },
  "web_accessible_resources": [
    "logo.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://is.muni.cz/*",
        "https://outlook.office.com/*",
        "https://outlook.cloud.microsoft/*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "jquery-3.3.1.min.js",
        "myscript.js"
      ]
    }
  ],
  "permissions": [
    "https://is.muni.cz/*",
    "https://outlook.office.com/*",
    "https://mu.hermannovi.com/*",
    "https://outlook.cloud.microsoft/*",
    "webRequest",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f95024e8-9ce6-4411-a6b9-3ac2ead8ca6d}"
    }
  }
}