Examine source code of Progressive Persona 1

{
  "theme": {
    "images": {
      "theme_frame": "prg_firefox_persona_header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Progressive Persona 1",
  "manifest_version": 2,
  "description": "Progressive Persona 1\n<a href=\"https://outgoing.prod.mozaws.net/v1/796967cd742be5ac2503ddb9ba399516115189c755074ef7c7cd6da0f645328e/http%3A//www.progressive.hu\" rel=\"nofollow\">www.progressive.hu</a>"
}