How can we earn bitcoins and ETH on tor browser and if there is free alt why please share it also. But no illegal thing.
You don't get paid for using TOR browser.
Check out Brave:
https://brave.com/I believe they have a program to reward users for not blocking ads, that's what the BAT token is for, or something like that.
Checked that out and it's not available yet . The site says: