Examine source code of LibrePhotos Browser Tools

{
  "manifest_version": 3,
  "name": "LibrePhotos Tools",
  "version": "1.5",
  "description": "Browser extension for LibrePhotos, including full-screen feature for the gallery.",
  "icons": {
    "16": "icons/icon-16x16.png",
    "32": "icons/icon-32x32.png",
    "48": "icons/icon-48x48.png",
    "128": "icons/icon-128x128.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "librephotos-browser-extension@jogojapan.xyz"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [],
  "action": {
    "default_title": "LibrePhotos Tools",
    "default_popup": ""
  }
}