Examine source code of Nighttime Vista Point

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#090320",
      "tab_background_text": "#7fa1ff"
    }
  },
  "version": "2.0",
  "name": "Nighttime Vista Point",
  "manifest_version": 2,
  "description": "Firefox branded theme with a few modifications and to a combined developer themed firefox logo and the current firefox logo."
}