Examine source code of Location Switcher

{
  "manifest_version": 3,
  "name": "Location Switcher",
  "description": "Switch between your real location and a fixed one, with exact or approximate precision, per-site rules and a quick pause. \n\nThis extension is provided for privacy/testing purposes; you are responsible for using it in compliance with applicable laws and the terms of any website you visit.",
  "version": "1.2.1",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Location Switcher"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "common/api.js",
      "common/defaults.js",
      "common/geo-utils.js",
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "common/api.js",
        "common/defaults.js",
        "common/geo-utils.js",
        "content/content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content/inject.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "location-switcher@addon",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "searchTerms",
          "locationInfo"
        ]
      }
    }
  }
}