Examine source code of Fire newt

{
  "theme": {
    "images": {
      "theme_frame": "top4.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#9bdb1c"
    }
  },
  "version": "2.0",
  "name": "Fire newt",
  "manifest_version": 2,
  "description": "A fire newt, salamander\nWorks best with the \"hide caption titlebar plus\" add on, so the line fits with your tabs."
}