Attachment Viewer: view in a tab, slideshow

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wót Wužywaŕ Firefox 3be33a dnja Now. 24, 2021 · trajny wótkaz

Great plugin, but not exactly that what I´m looking for.
Maybe a suggestion for the next version:
I´m looking for a addon that shows the pics I attatched in an mail as thumbnail, so I can check it easily before I will send it away... Thunderbird only shows the normal icon instead of a thumbnail in the attach section below the mail during the writing process...
Maybe you have a solution... ;)
I wrote in this way, because there it no other way to contact you...