Examine source code of txttools Branding

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Top.jpg"
    },
    "colors": {
      "frame": "#bababa",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "txttools Branding",
  "manifest_version": 2,
  "description": "First release of a basic txttools branding for Firefox. txttools is a two-way messaging platform based in England."
}