Examine source code of bolhas

{
  "name": "bolhas",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "bolhas.png"
    },
    "colors": {
      "frame": "rgba(133, 122, 24, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(168, 69, 65, 0.12)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(219, 198, 197, 0.09)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{406880a1-5e0c-41df-bf4c-405e062fcf3d}"
    }
  }
}