Examine source code of Blue-ish Fox

{
  "theme": {
    "images": {
      "theme_frame": "blue-ishFox-head.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue-ish Fox",
  "manifest_version": 2,
  "description": "Blueish personas theme, gradients from light blue to dark in the header image"
}