Examine source code of Opera86

{
  "name": "Opera86",
  "manifest_version": 2,
  "version": "89.14",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "bookmark_text": "#000",
      "frame": "#E3EBF2",
      "ntp_background": "#EFEFEF",
      "ntp_text": "#000",
      "popup": "#fff",
      "popup_border": "#fff",
      "popup_highlight": "#ccc",
      "popup_highlight_text": "#000",
      "popup_text": "#000",
      "sidebar": "#fff",
      "sidebar_border": "#fff",
      "sidebar_highlight": "#bbb",
      "sidebar_highlight_text": "#000",
      "sidebar_text": "#000",
      "tab_background_text": "#667889",
      "tab_line": "#aaa",
      "tab_selected": "#fff",
      "tab_text": "#1f1f1f",
      "toolbar": "#EFEFEF",
      "toolbar_field": "#fff",
      "toolbar_field_focus": "#fff",
      "toolbar_field_highlight": "#ddd",
      "toolbar_field_highlight_text": "#000",
      "toolbar_field_text": "#2A343D",
      "toolbar_field_text_focus": "#2A343D",
      "toolbar_text": "#2A343D",
      "toolbar_field_border": "rgba(0, 0, 0, 0)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_bottom_separator": "#B4C1CC",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{082b6beb-1e23-4675-812c-c2c5d5c5c584}"
    }
  }
}