Examine source code of Chrome Mask

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "author": "SKy Schubert",
  "homepage_url": "https://github.com/skyschub/chrome-mask",
  "version": "9.0.0",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "chrome-mask@overengineer.dev",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "id": "chrome-mask@overengineer.dev",
      "strict_min_version": "115.0"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "icons": {
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "64": "assets/icon-64.png",
    "96": "assets/icon-96.png"
  },
  "browser_action": {
    "default_icon": "assets/badge-indicator-off.svg",
    "default_title": "__MSG_maskStatusOff__",
    "default_popup": "popup.html",
    "default_area": "navbar"
  },
  "background": {
    "scripts": [
      "shared.js",
      "background_script.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "commands": {
    "toggle_mask": {
      "description": "__MSG_shortcutsToggleMask__"
    }
  }
}