Examine source code of Hide Private Mode

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.0.6",
  "developer": {
    "name": "Matt Hensman <m@matt.tf>",
    "url": "https://github.com/hensm/hide_private_mode"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hide_private_mode@matt.tf",
      "strict_min_version": "60.0"
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "contentLoader.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en",
  "manifest_version": 2,
  "permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "content.js"
  ]
}