Ahem, unless the browser only replaces the address when the amount is large enough, only when it is being used for the seonc time in N minutes...
Why would you copy the address from the browser again if you just had a successful bitcoin transaction?
Anyway, this address replacing issue is a much bigger problem than for just the Trezor, and that's why the payment protocol was created. I'm not sure if it's supported yet by the Trezor, but it's in the works at least.