Examine source code of Save The Oceans

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Save The Oceans",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(122, 153, 200)",
      "toolbar_text": "rgb(24, 206, 218)",
      "frame": "rgb(100, 94, 230)",
      "tab_background_text": "rgb(221, 247, 249)",
      "toolbar_field": "rgb(221, 247, 249)",
      "toolbar_field_text": "rgb(134, 141, 245)",
      "tab_line": "rgb(213, 245, 218)",
      "popup": "rgb(10, 69, 159)",
      "popup_text": "rgb(210, 212, 249)",
      "button_background_active": "rgb(156, 216, 153)",
      "button_background_hover": "rgb(248, 112, 140)",
      "popup_border": "rgb(250, 193, 205)",
      "popup_highlight_text": "rgb(241, 235, 216)",
      "sidebar_highlight_text": "rgb(213, 245, 218)",
      "sidebar_text": "rgb(221, 247, 249)",
      "tab_loading": "rgb(213, 245, 218)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{669253d5-65e4-4e62-b882-6cff1a6e8f0e}"
    }
  }
}