Examine source code of Lnk.Bio

{
  "name": "Lnk.Bio",
  "description": "Easily publish content from Firefox to Lnk.Bio",
  "version": "1.0.3",
  "manifest_version": 3,
  "permissions": [
    "identity",
    "storage",
    "activeTab",
    "scripting",
    "notifications"
  ],
  "icons": {
    "16": "icons/lnkbio_16.png",
    "32": "icons/lnkbio_32.png",
    "48": "icons/lnkbio_48.png",
    "128": "icons/lnkbio_128.png"
  },
  "background": {
    "scripts": [
      "background.js",
      "oauth2.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/lnkbio_128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/*"
      ],
      "extension_ids": [
        "firefox@lnkbio.com"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@lnk.bio",
      "strict_min_version": "58.0"
    }
  }
}