Hello CTCT259,

Would you try this please :

Type in the address bar about:config and press Enter (promise to be careful, if asked)

Type in the search bar webp

Look for the preference image.webp.enabled

and set its value to false

You may also want to toggle the preference image.http.accept

Then close and restart Firefox.

Thank you very much! Worked like a charm

CTCT259 said

Thank you very much! Worked like a charm

My pleasure - have a great weekend  !

Note that if you set image.webp.enabled to false then you won't be able to display WebP images in Firefox, so you can consider to leave this pref set to false. This pref doesn't affect WebP images send by website, but merely disables WebP support.

You need to remove",image/webp" from the two accept prefs to prevent websites from sending you WebP images.

• image.http.accept = */*
• network.http.accept.default = text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

cor-el said

Note that if you set image.webp.enabled to false then you won't be able to display WebP images in Firefox, so you can consider to leave this pref set to false. This pref doesn't affect WebP images send by website, but merely disables WebP support. You need to remove",image/webp" from the two accept prefs to prevent websites from sending you WebP images.

• image.http.accept = */*
• network.http.accept.default = text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Thanks for the help, I was already wondering why some picture weren't showing at all. But your soution fixed it for me. Thank you very much for the fix!