Examine source code of S Recorder

{
  "name": "__MSG_app_name__",
  "description": "__MSG_app_description__",
  "default_locale": "en",
  "short_name": "s_recorder",
  "version": "1.0.0",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "s-recorder@sizifart",
      "strict_min_version": "42.0"
    }
  },
  "icons": {
    "16": "icons/cam-16.png",
    "48": "icons/cam-48.png",
    "128": "icons/cam-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/cam-16.png",
      "32": "icons/cam-32.png"
    }
  },
  "background": {
    "scripts": [
      "js/launch.js"
    ]
  },
  "homepage_url": "https://sizifart.com"
}