Examine source code of Reach Autofill

{
  "manifest_version": 2,
  "name": "Reach Autofill",
  "version": "0.3.3",
  "description": "Fills job application forms in your own browser with your Reach profile, tailored resume and answers. You review and submit.",
  "browser_specific_settings": {
    "gecko": {
      "id": "autofill@reach.careers",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  },
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "https://reach.careers/*",
    "https://*.ashbyhq.com/*",
    "https://*.greenhouse.io/*",
    "https://*.lever.co/*",
    "https://*.zohorecruit.com/*",
    "https://*.zohorecruit.eu/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Reach Autofill",
    "default_icon": {
      "32": "icons/32.png",
      "64": "icons/64.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.ashbyhq.com/*",
        "https://*.greenhouse.io/*",
        "https://*.lever.co/*",
        "https://reach.careers/*",
        "https://*.zohorecruit.com/*",
        "https://*.zohorecruit.eu/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "icons/64.png"
  ]
}