Would it be possible to hardcode a feature that would allow users to whitelist specific domains or designate certain domains to always use a particular exit node? This feature could enhance the usability of the Tor Browser for individuals who require consistent access to certain websites while maintaining their privacy and security.

By implementing a whitelisting option, users could specify domains that should be routed through a selected exit node, ensuring that their traffic for those domains remains stable and predictable. This could be particularly beneficial for users who rely on specific services or resources that may be sensitive to IP changes or require consistent access.

Additionally, this feature could help mitigate issues related to exit node performance and reliability, as users could choose exit nodes that they trust or that are known to provide better connectivity for the whitelisted domains.
This rule should also be used when visiting another domain where the domain that is whitelisted is also visited. For example when visiting youtube.com the google.com connection should use the whitelisted rule.