If version 0.9.8.73 does not work, install the previous version 0.9.8.72, in it all images are displayed.
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Если не работает версия 0.9.8.73, установите прошлую версию 0.9.8.72, в ней всё миниатюры отображаются... по крайней мере у меня (браузер последней версии).

Оставляю пять звезд, так как прошлая вервия работает... прикреплю скриншоты:
Версия: 0.9.8.73
http://ipic.su/img/img7/fs/Ashampoo_Snap_6aprelya2020g.1586124190.png
http://ipic.su/img/img7/fs/Ashampoo_Snap_6aprelya2020g.1586124197.png
Версия: 0.9.8.72
http://ipic.su/img/img7/fs/Ashampoo_Snap_6aprelya2020g.1586124435.png
http://ipic.su/img/img7/fs/Ashampoo_Snap_6aprelya2020g.1586124536.png

Увеличиваемые аватары на данном сайте (https://allkey.org/poisk-predmet/semeynye-tayny-medlennyy-yadce), могут быть как из google профиля, так и из других..
Скриншот http://ipic.su/img/img7/fs/Ashampoo_Snap_6aprelya2020g.1586125411.png
P.S.
Спасибо за полезное дополнение.

Doesn't work on google images.

when it works it's fine, but the number of sites that it doesn't work on is extensive. this can presumably be fixed with "sieves" but there is no instruction on how to use them.

Works superbly allowing photos on sites with restricted width to be viewable at full size. Very much like the advanced options allowing customisation too.

With this I can scroll n see everything

This is great. No more having to click through tiny thumbnails one by one. I can just pause and see a detailed view right there on the same page.

Funktioniert soweit bei den meisten Bildern. Bei der Google Bilder Suche geht es gar nicht.

Sometimes works, sometimes not works.

Doesnt work any more on google images = useless for now.

Very useful!

Crap! Not even close to Thumbnail Zoom Plus. Why does Firefox recommend this?? Almost never works. PLEASE some kind soul make a better extension!

Not working on Google any more.