Examine source code of Sanity Check

{
  "manifest_version": 3,
  "name": "Sanity Check",
  "version": "0.1.1",
  "description": "A calm, private second opinion on job ads. Highlight a job's description, get a match / mismatch read-out and plain-English translations of phrases worth a closer look. All local, no accounts.",
  "browser_specific_settings": {
    "gecko": {
      "id": "sanity-check@dobybaxter.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_title": "Sanity Check this job",
    "default_popup": "popup.html",
    "default_icon": "icon.svg"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}