Set whether website icons are enabled. Website icons are disabled by default.
When website icons are disabled, the #WebKitFaviconDatabase of manager is closed and
its reference removed, so webkit.website_data_manager.WebsiteDataManager.getFaviconDatabase will
return null. If website icons are enabled again, a new #WebKitFaviconDatabase will
be created.
Set whether website icons are enabled. Website icons are disabled by default. When website icons are disabled, the #WebKitFaviconDatabase of manager is closed and its reference removed, so webkit.website_data_manager.WebsiteDataManager.getFaviconDatabase will return null. If website icons are enabled again, a new #WebKitFaviconDatabase will be created.