Examine source code of 2BBBBBB

{
  "name": "2BBBBBB",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Character-2B-Portrait(1).png"
    },
    "colors": {
      "frame": "rgba(135, 135, 135, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(117, 117, 117, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(217, 217, 217, 1)",
      "toolbar_field_text": "rgba(61, 61, 61, 1)",
      "tab_line": "rgba(242, 242, 242, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{050bc741-6190-4e4c-876f-2c6540d647a5}"
    }
  }
}