Just one image blurring

Hi All,

I’m having an issue with just one image on my website.

https://olivierprestant.com/?page_id=205 – this is the page and it’s the main image beside the text that’s causing issues. These pages (under prestations on the menu) all have the same format: image + text with photo album underneath. In some browsers the images are very small (chrome) and in some they’re medium size (firefox). This isn’t such an issue because it looks fine either way. However, on this one page the image is constantly blurry if you view it using firefox. I’ve tried a lot of different types of the same image – smaller/larger/I’ve taken screen shots and used those, and nothing seems to work. I can’t see anything in the html. And all the other pages and images are fine, it’s just this one…

Any help appreciated!
aisling