Examine source code of Simple Dark Red Lattice

{
  "name": "Simple Dark Red Lattice",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Firefox.red.&.Grey.vi.latice.firefox.bkg.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(33, 33, 33, 1)",
      "bookmark_text": "rgba(255, 79, 79, 1)",
      "toolbar_field": "rgba(59, 59, 59, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  }
}