Large portrait images gets distorted to landscape size
The problem emerged with recent version. Once i try to zoom them in they get distorted to landscape orientation.

image for test https://yadi.sk/i/E-vJU6ZV3Pb5hs
It works correctly in my pre-Quantum Firefox
Cannot reproduce.
was fixed in version 18
I still have the issue. Here's the specific image, if it helps.

I'm aware this is a bug. No need to post any more pictures.
It's also a bug that's hard to fix, because there isn't a good way to detect images like this.
It actually turned that version 18 didn't fix it. I just forgot to open original image when checking.
But version 20 does fix it for sure. The only problem is that Waterfox didn't find the update from AMO, so had to uninstall/reinstall it.
So @walllable, make sure you have updated version 20.
Well, 21 breaks it again.
Can you bring back version 20, or at least provide xpi. It's not on AMO.