Examine source code of GrameenPhone

{
  "theme": {
    "images": {
      "theme_frame": "gp_header.jpg"
    },
    "colors": {
      "frame": "#a6a6a6",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "GrameenPhone",
  "manifest_version": 2,
  "description": "I created this Persona Theme for Firefox to promote and represent \"GrameenPhone Ltd.\" the company where I work as an employee. I hope, everyone who knows about GP and Bangladesh will like this Theme and especially the employees of GP will personalize it on their own browser! Cheers!!!"
}