Examine source code of Foretag

{
  "manifest_version": 2,
  "version": "2.1",
  "name": "foretag",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(25, 25, 25)",
      "toolbar_text": "rgb(123, 121, 123)",
      "frame": "rgb(25, 25, 25)",
      "tab_background_text": "rgb(68, 68, 68)",
      "toolbar_field": "rgb(28, 28, 28)",
      "toolbar_field_text": "rgb(241, 237, 241)",
      "tab_line": "rgb(48, 48, 48)",
      "popup": "rgb(28, 28, 28)",
      "popup_text": "rgb(123, 121, 123)",
      "icons": "rgb(48, 48, 48)",
      "tab_selected": "rgb(28, 28, 28)",
      "tab_text": "rgb(241, 237, 241)",
      "toolbar_field_border": "rgb(48, 48, 48)",
      "toolbar_field_highlight": "rgb(93, 33, 210)",
      "tab_loading": "rgb(48, 48, 48)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4753346-7f02-4623-837c-21f5849eccf8}"
    }
  }
}