Examine source code of Header off ___!

{
  "name": "Header off ___!",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "winner medal chesskid 1st place.png"
    },
    "colors": {
      "frame": "rgba(255, 0, 30, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(122, 75, 75, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(18, 255, 85, 0.17)",
      "toolbar_field_text": "rgba(184, 138, 70, 1)"
    }
  }
}