Examine source code of Claude

{
  "manifest_version": 2,
  "name": "Claude-dark",
  "version": "1.0",
  "description": "A simple colour theme inspired by claude.",
  "browser_specific_settings": {
    "gecko": {
      "id": "theme_claude_dark@installsh.protonme",
      "strict_min_version": "91.0"
    }
  },
  "theme": {
    "colors": {
      "frame": "#141413",
      "frame_inactive": "#151514",
      "tab_background_text": "#FFFFFF",
      "tab_selected": "#d97757",
      "tab_text": "#FFFFFF",
      "tab_loading": "#FFFFFF",
      "tab_line": "#585653",
      "toolbar": "#141413",
      "toolbar_text": "#FFFFFF",
      "toolbar_top_separator": "#585653",
      "toolbar_bottom_separator": "#585653",
      "toolbar_vertical_separator": "#585653",
      "toolbar_field": "#faf9f5",
      "toolbar_field_text": "#000000",
      "toolbar_field_border": "#d97757",
      "toolbar_field_focus": "#141413",
      "toolbar_field_text_focus": "#FFFFFF",
      "toolbar_field_border_focus": "#FFFFFF",
      "toolbar_field_highlight": "#d97757",
      "toolbar_field_highlight_text": "#141413",
      "icons": "#FFFFFF",
      "icons_attention": "#d97757",
      "button_background_hover": "#d97757",
      "button_background_active": "#d97757",
      "popup": "#000000",
      "popup_text": "#FFFFFF",
      "popup_border": "#d97757",
      "popup_highlight": "#000000",
      "popup_highlight_text": "#FFFFFF",
      "sidebar": "#000000",
      "sidebar_text": "#FFFFFF",
      "sidebar_border": "#585653",
      "sidebar_highlight": "#585653",
      "sidebar_highlight_text": "#FFFFFF",
      "ntp_background": "#141413",
      "ntp_text": "#FFFFFF",
      "ntp_card_background": "#d97757"
    }
  }
}