Firefox ? Chrome ? Brave ?
Kinda worried because all of them try to collect information about your activities online. I've purchased BitDefender AntiVirus, and taken some other precautions but... can never be too careful as they say.
I think all 3 browsers are the same as they all use chromium kernel. They have only slight publisher difference and brave will prevail if OP is looking for a browser for privacy and crypto related.
When you use extensions like metamask or software wallet, there is no guarantee of your safety. The only way is to use it only on dedicated computers to perform crypto-related operations, not to visit strange links, and not to install pirated or cracked software.
We never know which one of the browsers is 100% safe when using Metamask, In my long time experience trading in crypto and using Metamask. I never experience any problem and the best way to protect yourself is always check the website that you are accessing and never ever "Sign in" on that you think is a phishing website. Some are using Trezor to access Metamask to fully secure their asset since it requires the hardware before it can be accessed or make transactions.