Many recommend Firefox and Many also recommend Chrome, I think both are good browsers for metamask,
I use both and there is no problem, but be careful when using Metamask don't use VPN if you want to be safe, just giving information
We have no problem to metask for chrome and firefox because they are both the best and most popular browsers, but the vulnerability is affected by the use of vpn, installed virus applications, malicious extensions and etc. Chances are the app has clipboard malware embedded that detects when it copies private keys and mnemonic phrases, so check the apps and extensions on your OS before losing assets in the wallet.