Examine source code of Storm

{
  "manifest_version": 3,
  "name": "Storm",
  "short_name": "Storm",
  "version": "4.10",
  "author": "Krypton Nova",
  "description": "Storm enables hotkeys for military gameplay on NationStates.",
  "permissions": [
    "storage",
    "notifications"
  ],
  "action": {
    "browser_style": false,
    "default_icon": "/ext-resources/icon.png",
    "default_popup": "/popup.html",
    "default_title": "Storm"
  },
  "background": {
    "scripts": [
      "/scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "/scripts/content.js"
      ],
      "matches": [
        "*://www.nationstates.net/*"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://www.nationstates.net/page=ajax2/a=reports/view=world/filter=move+member+endo",
        "*://www.nationstates.net/template-overall=none/page=reports",
        "*://www.nationstates.net/page=ajax2/a=reports/view=region*"
      ],
      "run_at": "document_start",
      "css": [
        "/ext-resources/no-template.css"
      ]
    },
    {
      "matches": [
        "*://www.nationstates.net/template-overall=none/page=reports"
      ],
      "run_at": "document_start",
      "css": [
        "/ext-resources/no-template-reports.css"
      ]
    },
    {
      "matches": [
        "*://www.nationstates.net/page=ajax2/a=reports/view=world/filter=change"
      ],
      "run_at": "document_start",
      "css": [
        "/ext-resources/no-template-world-changes.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4a49c185-c0fa-465c-993c-a673c96a6ccc}"
    }
  }
}