UserAgent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 OPR/45.0.2552.898

Example URL:
http://www.fnordware.com/j2k/relax.jp2

Steps to reproduce the problem:
Open

http://www.fnordware.com/j2k/relax.jp2

What is the expected behavior?
Browser shows the image.

What went wrong?
Browser downloads the image. When jpeg2000 image embedded into the page - browser shows ico for incorrect url of the image.

Safari supports jpeg2000.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 58.0.3029.110  Channel: n/a
OS Version: 
Flash Version: 

jpeg2000 is more progressive format than jpeg.