Examine source code of Motitab

{
  "manifest_version": 2,
  "name": "Motitab",
  "version": "1.0.3",
  "permissions": [],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Motivation New Tab Page",
    "default_popup": "menu.html"
  },
  "description": "Custom new tab page for Firefox/Chrome with motivational elements"
}