Examine source code of SpringWildflowers

{
  "name": "SpringWildflowers",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Copy of 3000x200 Firefox Theme Size.png"
    },
    "colors": {
      "frame": "rgba(248, 163, 0, 1)",
      "tab_background_text": "rgba(245, 185, 53, 1)",
      "bookmark_text": "rgba(248, 163, 0, 1)",
      "toolbar_field_text": "rgba(176, 112, 0, 1)"
    }
  }
}