Examine source code of Shellfox

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "0.14",
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://hak.xwx.moe/jadedctrl/shellfox",
  "author": "Jaidyn Ann",
  "default_locale": "en",
  "icons": {
    "16": "img/shellfox-16.png",
    "32": "img/shellfox-32.png",
    "48": "img/shellfox-48.png",
    "512": "img/shellfox-512.png"
  },
  "page_action": {
    "default_icon": {
      "19": "img/shellfox-action-19.png",
      "38": "img/shellfox-action-38.png",
      "150": "img/shellfox-action.png"
    },
    "default_title": "__MSG_pageActionName__"
  },
  "browser_action": {},
  "permissions": [
    "activeTab",
    "downloads",
    "nativeMessaging",
    "menus",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "shellfox@xwx.moe",
      "strict_min_version": "57.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "html/options.html?in_ui"
  }
}