Examine source code of Offline Spell Check for Web Pages

{
  "manifest_version": 3,
  "name": "Offline Spell Check for Web Pages",
  "version": "1.0.1",
  "description": "Finds misspelled words on any web page. Works 100% offline. No account, no ads, no tracking, no data leaves your browser.",
  "browser_specific_settings": {
    "gecko": {
      "id": "offline-spell-check@sserpolar.github.io",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Spell-check this page (offline)"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "homepage_url": "https://github.com/sserpolar/offline-spell-check"
}