Examine source code of OutZoom

{
  "manifest_version": 3,
  "name": "OutZoom",
  "description": "Zoom in and out on images and videos using shift + mouse wheel and by other ways.",
  "version": "1.0.1",
  "icons": {
    "16": "/icon/16.png",
    "32": "/icon/32.png",
    "48": "/icon/48.png",
    "128": "/icon/128.png"
  },
  "homepage_url": "https://github.com/tglagcs/outzoom",
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "action": {
    "default_title": "OutZoom — zoom in / out on images and videos",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "outzoom@tglagcs.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "css": [
        "content-scripts/content.css"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}