Examine source code of FiltersForLinkedIn

{
  "manifest_version": 3,
  "name": "FiltersForLinkedIn",
  "version": "0.0.1",
  "description": "Lets you hide job offers from certain companies on LinkedIn",
  "permissions": [
    "storage",
    "webNavigation"
  ],
  "developer": {
    "name": "David C"
  },
  "icons": {
    "48": "icons/logo.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "filtersforlinkedin@davidc.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/jobs/*"
      ],
      "js": [
        "./dist/browser-polyfill.js",
        "./dist/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "./dist/browser-polyfill.js",
      "./dist/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": "icons/logo.svg",
    "default_title": "Click to open FiltersForLinkedIn settings",
    "default_popup": "src/popup/popup.html"
  },
  "options_ui": {
    "page": "src/options/options.html"
  }
}