Examine source code of Tfactorhow

{
  "theme": {
    "images": {
      "theme_frame": "tfactorhowarrowsssmall.jpg"
    },
    "colors": {
      "frame": "#1170ab",
      "tab_background_text": "#289df0"
    }
  },
  "version": "2.0",
  "name": "Tfactorhow",
  "manifest_version": 2,
  "description": "I like arrows, use it, maker: T H"
}