Examine source code of New Tab Tools

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "92.1",
  "icons": {
    "48": "images/icon.svg"
  },
  "applications": {
    "gecko": {
      "id": "newtabtools@darktrojan.net",
      "strict_min_version": "91.0"
    }
  },
  "chrome_url_overrides": {
    "newtab": "newTab.xhtml"
  },
  "background": {
    "scripts": [
      "common.js",
      "tiles.js",
      "prefs.js",
      "background.js",
      "lib/zip.js",
      "export.js"
    ]
  },
  "browser_action": {
    "default_icon": "images/tools-light.svg",
    "theme_icons": [
      {
        "dark": "images/tools-light.svg",
        "light": "images/tools-dark.svg",
        "size": 16
      }
    ],
    "default_popup": "action.html",
    "default_title": "__MSG_extensionName__",
    "browser_style": true
  },
  "permissions": [
    "<all_urls>",
    "idle",
    "menus",
    "sessions",
    "storage",
    "tabs",
    "topSites",
    "webNavigation"
  ],
  "optional_permissions": [
    "bookmarks",
    "downloads",
    "history"
  ],
  "default_locale": "en",
  "manifest_version": 2
}