Examine source code of Faves on Tabs

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.2",
  "background": {
    "scripts": [
      "background/offboarding.js",
      "background/onboarding.js",
      "background/upboarding.js",
      "background/newwindow.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "pages/newtab.html"
  },
  "default_locale": "en",
  "developer": {
    "name": "Thomas Van Steenwinckel"
  },
  "homepage_url": "https://www.1234.pm/favesontabs/",
  "icons": {
    "50": "icons/50.png",
    "100": "icons/100.png"
  },
  "options_ui": {
    "page": "options/preferences.html",
    "browser_style": true,
    "chrome_style": true
  },
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{efb959d1-d553-4436-8bfa-8ff5c384e0d9}"
    }
  }
}