Examine source code of Fire and IceV.2

{
  "name": "Fire and IceV.2",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Fire and Ice.png"
    },
    "colors": {
      "frame": "rgba(227, 229, 232, 0)",
      "tab_background_text": "rgba(109, 217, 227, 0.75)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(0, 0, 0, 0.99)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(71, 65, 65, 1)"
    }
  }
}