Examine source code of Rainbow12345

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Rainbow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.88)",
      "toolbar_text": "rgb(255, 211, 255)",
      "frame": "rgb(56, 13, 97)",
      "tab_background_text": "rgb(255, 244, 255)",
      "toolbar_field": "rgba(255, 209, 255, 0.22)",
      "toolbar_field_text": "rgba(234, 253, 255, 0.85)",
      "tab_line": "rgba(112, 248, 237, 0.37)",
      "popup": "rgb(29, 29, 29)",
      "popup_text": "rgb(209, 235, 241)",
      "button_background_hover": "rgba(129, 22, 231, 0.57)",
      "icons_attention": "rgba(255, 37, 249, 0.57)",
      "icons": "rgb(17, 180, 217)",
      "popup_border": "rgb(107, 22, 231)",
      "tab_selected": "rgba(39, 34, 46, 0.57)",
      "toolbar_bottom_separator": "rgb(188, 14, 252)",
      "toolbar_field_border_focus": "rgba(0, 255, 255, 0.65)",
      "toolbar_field_border": "rgba(12, 240, 236, 0.23)",
      "toolbar_field_focus": "rgb(39, 39, 39)",
      "toolbar_field_highlight": "rgb(107, 22, 231)",
      "tab_loading": "rgba(112, 248, 237, 0.37)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa0132ce-a897-4aff-8bf1-dcd8b5b334f6}"
    }
  }
}