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Regardless of Trezor’s security guarantees: The fact that you are even _asking_ this question suggests that you should get a separate computer to handle your **sensitive financial assets whose loss would seriously hurt** and a separate one for experimenting with **possibly malware infected applications**.
Trezor strongly protects your private keys from being stolen by malware. The same can’t be said about the rest of the chain: malware can steal data about your accounts and assets, replace your address in clipboard, use your exchange logins, etc.
Just because you wear a helmet and a hi vis vest doesn’t mean you’ll have fun playing in traffic.