Examine source code of rend

{
  "manifest_version": 2,
  "version": "2.1",
  "name": "rend",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(3, 3, 3)",
      "toolbar_text": "rgb(251, 245, 243)",
      "frame": "rgb(3, 48, 48)",
      "tab_background_text": "rgb(251, 245, 243)",
      "toolbar_field": "rgb(3, 3, 3)",
      "toolbar_field_text": "rgb(251, 245, 243)",
      "tab_line": "rgb(0, 251, 195)",
      "popup": "rgb(3, 3, 3)",
      "popup_text": "rgb(251, 245, 243)",
      "icons_attention": "rgb(254, 49, 152)",
      "icons": "rgb(251, 245, 243)",
      "popup_border": "rgb(254, 49, 152)",
      "popup_highlight_text": "rgb(3, 3, 3)",
      "popup_highlight": "rgb(0, 251, 195)",
      "sidebar_highlight": "rgb(254, 49, 152)",
      "toolbar_field_border_focus": "rgb(254, 49, 152)",
      "toolbar_field_focus": "rgb(3, 3, 3)",
      "tab_loading": "rgb(0, 251, 195)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3cba7cef-beca-4f9e-829a-aed00737d4d2}"
    }
  }
}