Finally found a replacement for the previous legacy thumbnail zoom add-on I had been using - thanks!

Mantap

Works fine, very useful especially on Reddit.

This is an excellent addon and works perfectly for me every day.
But I ask . .
1. Is there any way to CHANGE this keyboard shortcut for saving the image - because it's the same shortcut as the Firefox 'Save Page' - - and half the time that's what turns up - - instead of the Imagus one.
There is no option to alter this shortcut - 'Ctrl + S' - Save pop-up content (clashes with Firefox shortcut)
2. Can you please add - 'Show Image Size' - eg. 2048 x 1536 - as an option.
It appeared in the old 'Thumbnail Zoom' addon - on the bottom right of the pop-up and was very useful.

Has a bunch of options except the most important one: resizing the enlarged image. By default it takes up majority of the screen. Very annoying.

The best image/video zooming extension available. The only thing missing that I'd really like to see is a timestamp on videos/gifs.

I like it!

Good

SUPER félicitations et merci
jurasud

Isn't worth a thing, compared to Thumbnail Zoom Plus.
As Thumbnail doesn't work on the new version of Firefox, I disintalled the latter and came back to the old one I had before.
The only way to have Thumbnail work.
Too many add-ons don't work on the new Firefox version so I threw Imagus directly in the trash, with the new Firefox version.

OMG
WOW
Everything is here.
LOVE IT :D

Wish I could extract the settings though :D