Examine source code of Dark Space Amoled

{
  "manifest_version": 2,
  "version": "1.1.3",
  "default_locale": "en",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "author": "__MSG_extensionAuthor__",
  "browser_specific_settings": {
    "gecko": {
      "id": "{22b0eca3-8c02-4f0d-a5d7-1604dda9836e}",
      "strict_min_version": "89.0"
    }
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "img/background.gif"
      ]
    },
    "properties": {
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "button_background_active": "#0A0A0A",
      "button_background_hover": "#070707",
      "bookmark_text": "rgba(255 255 255 / 0.8)",
      "frame": "#000000",
      "frame_inactive": "#000000",
      "icons": "rgba(255 255 255 / 0.8)",
      "icons_attention": "#9400ff",
      "ntp_background": "#000000",
      "ntp_text": "rgba(255 255 255 / 0.8)",
      "popup": "#020202",
      "popup_border": "#121212",
      "popup_highlight": "#121212",
      "popup_highlight_text": "white",
      "popup_text": "rgba(255 255 255 / 0.8)",
      "sidebar": "#101010",
      "sidebar_border": "#121212",
      "sidebar_highlight": "#FFFFFF",
      "sidebar_highlight_text": "white",
      "sidebar_text": "rgba(255 255 255 / 0.8)",
      "tab_background_separator": "transparent",
      "tab_background_text": "#aaaaaa",
      "tab_loading": "white",
      "tab_selected": "rgba(42 42 42 / 0.07)",
      "tab_text": "#ffffff",
      "tab_line": "rgba(53 53 53 / 0.14)",
      "toolbar": "rgba(2 2 2 / 0.8)",
      "toolbar_bottom_separator": "#101010",
      "toolbar_field": "#000000",
      "toolbar_field_border": "transparent",
      "toolbar_field_border_focus": "#030303",
      "toolbar_field_focus": "#010101",
      "toolbar_field_highlight": "rgba(255 255 255 / 0.2)",
      "toolbar_field_highlight_text": "white",
      "toolbar_field_text": "rgba(255 255 255 / 0.8)",
      "toolbar_field_text_focus": "white",
      "toolbar_top_separator": "rgba(18, 18, 18, 0.0)",
      "toolbar_vertical_separator": "rgba(255 255 255 / 0.14)"
    }
  }
}