Examine source code of corru.observer ::/FRAME/

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "corru.observer ::/FRAME/",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e0724624-abeb-49e8-bc67-768ba746fe69}",
      "strict_min_version": "63.0"
    }
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 0)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 0, 102)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "icons_attention": "rgb(255, 0, 102)",
      "icons": "rgb(255, 255, 0)",
      "ntp_background": "rgb(0, 0, 0)",
      "popup_border": "rgb(255, 0, 102)",
      "popup_highlight": "rgb(255, 0, 102)",
      "toolbar_bottom_separator": "rgb(255, 0, 102)",
      "toolbar_field_border": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 0, 102)"
    }
  }
}