Examine source code of Zenitsu triangles

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Zenitsu triangles",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(244, 210, 66)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(235, 201, 31)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(100, 88, 13)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(100, 88, 13)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{99b946c2-9dda-49a0-a790-c6a9e014269d}"
    }
  }
}