Examine source code of Just Shapes & Beats

{
  "name": "js&b",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "bannerBackgroundImage_2a3n2376p0l31jsab.png"
    },
    "colors": {
      "frame": "rgba(13, 36, 41, 1)",
      "tab_background_text": "rgba(37, 102, 101, 1)",
      "toolbar": "rgba(0, 93, 133, 0.57)",
      "bookmark_text": "rgba(199, 255, 252, 1)",
      "toolbar_field": "rgba(61, 0, 35, 0.9)",
      "toolbar_field_text": "rgba(255, 38, 128, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e8f5ccf-bc83-492a-b153-74d6e2e3cdac}"
    }
  }
}