Examine source code of Alt Tong

{
  "manifest_version": 2,
  "name": "Alt Tong",
  "short_name": "__MSG_extensionName__",
  "version": "0.4resigned1",
  "description": "__MSG_extensionDescription__",
  "author": "__MSG_author__",
  "homepage_url": "https://github.com/maxnikulin/alt-tong",
  "default_locale": "en",
  "icons": {
    "48": "icons/alt-tong-48.png",
    "96": "icons/alt-tong-96.png"
  },
  "permissions": [
    "contextMenus",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "applications": {
    "gecko": {
      "id": "alt-tong-desktop@maxnikulin.github.io",
      "strict_min_version": "53.0"
    }
  }
}