Examine source code of Test theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#274751"
    }
  },
  "version": "2.0",
  "name": "Test theme",
  "manifest_version": 2,
  "description": "This is a test theme.\nI have no idea why, but firefox isnt smart enough to notice that I am a windows 7 user, it does not explain how to test themes offline, it gives me instructions for a Mac OS......\n\nThis is ridiculous if you ask me.. I checkeed all settings, googled all relative solutions and I found nothing at all."
}