Thank you for your review! The feature of customizing file names is right in development and will likely to be available with the next release of PhotoShow. Please stay tuned 😃.

Sorry but I didn't get your idea regarding the "smaller viewfinder" stuff. It'd be appreciated if you could reach out to vincentwang863@gmail.com for a further explanation. Thanks.

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Update on 27 March 2022: The filename customization has been supported since version 4.15.0.0. Please wait for Mozilla finishing its review. Thank you.