Examine source code of White Minimal

{
  "name": "White Minimal",
  "manifest_version": 2,
  "version": "1.1resigned1",
  "theme": {
    "images": {
      "theme_frame": "Untitled-1.png"
    },
    "colors": {
      "frame": "rgba(250, 250, 250, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(252, 252, 252, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{af9832f2-3ca5-4036-aea4-f99cb0b320bb}"
    }
  }
}