TYPO3 Core

Hi,

if you try to edit a very large image with the image editor in Firefox ESR 45.7.0 the image itsself is misplaced (see screenshot 1). It is below the actual viewport. Editng the image is then impossible. Testing showed that the amount of misplacement is dependent on the available viewport and the image height.

Using a much smaller file, works fine (screenshot 2).

The JS console showed no errors.

I added the used images for testing purposes.

The error is bound to the ESR version of firefox. "Standard" firefox (version 51.0.1) works as expected.

This FF version is important, because some or more universities in Germany use this as their standard browser.

• TYPO3 version: 8.6.1
• PHP version: 7.0
• Firefox version: 45.7.0 ESR (Windows and Mac tested)