Examine source code of watermelon-i3

{
  "name": "watermelon-i3",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "firefox_bg.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(243, 85, 136, 1)",
      "toolbar": "rgba(26, 67, 20, 1)",
      "bookmark_text": "rgba(255, 187, 180, 1)",
      "toolbar_field": "rgba(113, 169, 90, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3acd960f-0794-413c-a4de-1ade2000fb4d}"
    }
  }
}