Vivaldi is probably the most ethical company making a for-profit browser now. But note that because it is a for-profit it tracks your installation, with an anonymous but unique id, and phones home every time you use the browser. There were complains about this in the forum, but Vivaldi said they had to do that to know how many unique users they have, to make browser deals with other companies. They refused to change that and instead suggested that interested parties could use an application firewall to block those connections from Vivaldi.