Examine source code of Fusion

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Fusion",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(50, 55, 104)",
      "toolbar_text": "rgb(234, 234, 234)",
      "frame": "rgb(81, 89, 138)",
      "tab_background_text": "rgb(255, 0, 117)",
      "toolbar_field": "rgba(37, 42, 79, 0)",
      "toolbar_field_text": "rgb(0, 255, 110)",
      "tab_line": "rgb(255, 0, 117)",
      "popup": "rgb(37, 42, 79)",
      "popup_text": "rgb(234, 234, 234)",
      "button_background_active": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(188, 188, 188)",
      "frame_inactive": "rgb(24, 30, 68)",
      "icons_attention": "rgb(188, 188, 188)",
      "icons": "rgb(255, 0, 117)",
      "ntp_background": "rgb(68, 75, 131)",
      "ntp_text": "rgb(255, 0, 117)",
      "popup_border": "rgb(0, 255, 110)",
      "popup_highlight_text": "rgb(255, 0, 4)",
      "popup_highlight": "rgb(59, 66, 132)",
      "sidebar_border": "rgb(0, 255, 110)",
      "sidebar_highlight_text": "rgb(255, 0, 117)",
      "sidebar_highlight": "rgb(37, 42, 79)",
      "sidebar_text": "rgb(234, 234, 234)",
      "sidebar": "rgb(37, 42, 79)",
      "tab_background_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 0, 117)",
      "tab_selected": "rgb(70, 74, 136)",
      "tab_text": "rgb(0, 255, 110)",
      "toolbar_bottom_separator": "rgb(0, 162, 136)",
      "toolbar_field_border_focus": "rgb(137, 144, 223)",
      "toolbar_field_border": "rgb(255, 0, 117)",
      "toolbar_field_focus": "rgba(50, 55, 104, 0.5)",
      "toolbar_field_highlight_text": "rgb(0, 255, 207)",
      "toolbar_field_highlight": "rgb(0, 0, 0)",
      "toolbar_field_separator": "rgb(0, 162, 136)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgb(0, 162, 136)",
      "toolbar_vertical_separator": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{477a7442-fb80-40bc-897d-a24200057c18}"
    }
  }
}