But then the big question arises. Is it possible for a DEX site to move from normal browser to the TOR browser? I am not sure whether the Java Scripts and all would run without any issues in TOR. There may be a lag as well, as TOR is slower than the ordinary browsers due to the requirement of relaying information to multiple nodes.
Newer Tor Browser enable JavaScript by default. Lag is a trade-off for better privacy and people who use Tor know this fact.
Another issue is with the security. Knowing how vulnerable ERC-20 platform can be to hacking, I am a bit skeptical about linking the wallet to any DEX sites that operates in TOR. I am not an expert in TOR, so my fear may be illogical.
Most ERC-20 platform vulnerable you heard probably because using insecure computer, malicious wallet or bad implementation of ERC 20.
While there are few security concern while using Tor, you should be fine by using up-to-date Tor/Tor Browser and always encrypt your connection.
BTW are there any DEX sites which are active now and running on TOR? I haven't heard of any and would like to try.
https://bisq.network/