Examine source code of Matcha-Sea

{
  "manifest_version": 2,
  "version": "3.1",
  "name": "Matcha-sea",
  "theme": {
    "properties": {
      "color_scheme": "system",
      "content_color_scheme": "system"
    },
    "colors": {
      "bookmark_text": "light-dark(#303d41, #abb9b6)",
      "button_background_active": "light-dark(rgba(98, 197, 177, 0.75), rgba(42, 114, 102, 0.75))",
      "button_background_hover": "light-dark(#e3e3e3, #3c4c51)",
      "frame": "light-dark(#ffffff, #222b2e)",
      "frame_inactive": "light-dark(#f7f7f7, #1b2224)",
      "icons": "light-dark(#273134, #ccd7d4)",
      "icons_attention": "light-dark(#2eb398, #2eb398)",
      "ntp_background": "light-dark(#f7f7f7, #1b2224)",
      "ntp_card_background": "light-dark(#fcfcfc, #263034)",
      "ntp_text": "light-dark(#273134, #ccd7d4)",
      "popup": "light-dark(#fcfcfc, #263034)",
      "popup_border": "light-dark(rgba(84, 144, 132, 0.68125), rgba(66, 135, 128, 0.71875))",
      "popup_highlight": "light-dark(#2eb398, #2eb398)",
      "popup_highlight_text": "light-dark(#ffffff, #ffffff)",
      "popup_text": "light-dark(#273134, #ccd7d4)",
      "sidebar": "light-dark(#f7f7f7, #1b2224)",
      "sidebar_border": "light-dark(rgba(115, 115, 115, 0.575), rgba(81, 102, 110, 0.625))",
      "sidebar_highlight": "light-dark(rgba(98, 197, 177, 0.75), rgba(42, 114, 102, 0.75))",
      "sidebar_highlight_text": "light-dark(#ffffff, #ffffff)",
      "sidebar_text": "light-dark(#273134, #ccd7d4)",
      "tab_background_separator": "light-dark(rgba(115, 115, 115, 0.575), rgba(81, 102, 110, 0.625))",
      "tab_background_text": "light-dark(#303d41, #abb9b6)",
      "tab_line": "light-dark(#2eb398, #2eb398)",
      "tab_loading": "light-dark(#2eb398, #2eb398)",
      "tab_selected": "light-dark(rgba(147, 213, 200, 0.25), rgba(37, 107, 94, 0.25))",
      "tab_text": "light-dark(#273134, #ccd7d4)",
      "toolbar": "light-dark(#ffffff, #222b2e)",
      "toolbar_bottom_separator": "light-dark(rgba(115, 115, 115, 0.575), rgba(81, 102, 110, 0.625))",
      "toolbar_field": "light-dark(#f7f7f7, #1b2224)",
      "toolbar_field_border": "light-dark(#e3e3e3, #3c4c51)",
      "toolbar_field_border_focus": "light-dark(#2eb398, #2eb398)",
      "toolbar_field_focus": "light-dark(#ffffff, #222b2e)",
      "toolbar_field_highlight": "light-dark(#2eb398, #2eb398)",
      "toolbar_field_highlight_text": "light-dark(#ffffff, #ffffff)",
      "toolbar_field_text": "light-dark(#273134, #ccd7d4)",
      "toolbar_field_text_focus": "light-dark(#273134, #ccd7d4)",
      "toolbar_text": "light-dark(#273134, #ccd7d4)",
      "toolbar_top_separator": "light-dark(rgba(115, 115, 115, 0.575), rgba(81, 102, 110, 0.625))",
      "toolbar_vertical_separator": "light-dark(rgba(115, 115, 115, 0.575), rgba(81, 102, 110, 0.625))"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{af2ad6a0-7ed8-4734-afb6-d01c9f57c41f}"
    }
  }
}