The current Ethereum Mainnet will merge with the Beacon Chain proof-of-stake system. This will mark the end of proof-of-work for Ethereum, and the full transition to proof-of-stake. For more information, please refer to the following source: The Merge | ethereum.org
We are supporting the Ethereum Merge and there is no user action needed.
As the outcome of the Merge fork is uncertain; we have no imminent plan to support ETHW. However, we will evaluate the situation based on the community’s reaction after the merge.
Please also keep in mind that the token ETHPoW does not currently have any proper documentation, so it is not fully clear how it will work. If the developers of this token disable the replay protection (EIP-155), it could be even dangerous to spend those tokens since you would risk your ETH tokens on the Ethereum mainnet.
You can subscribe to our newsletter through our form that is located at the bottom of our website (http://trezor.io) and follow our blog at https://blog.trezor.io and Twitter profile at https://twitter.com/Trezor to be on top of the news. We will introduce articles with more details on this situation.
Nevertheless ETHW (since it is - almost fully - supported by firmware of both Trezor models) can be accessed by 3rd party wallet. In order to do so, you can connect your Trezor for example with MetaMask and access the address where you had your ETH during the merge.
Then you have to set custom network RPC as following:
Please also keep in mind that the token mentioned - ETHPoW - does not currently have any proper documentation, so it is not fully clear how it will work.
Also, it could be dangerous to spend these tokens as you would risk replay attacks because of the Chain ID that ETHW devs have chosen:
Since chain ID protects network users against replay attacks (It specifies the network on which a transaction is valid) and Ethereum POW have chosen a chain ID that is already being used by different chain (Smart Bitcoin Cash Testnet) it expose users to replay attacks on both of these chains.