It is using the Avif format (for images) for a 2x compression bonus over PNG while still maintaining a higher quality over JPG.
If you can't view the images then it means you are likely using an outdated browser, all current versions of browsers support it (afaik) except Internet Explorer.[0]
...And if you are using Internet Explorer, then god help you.
Since this is a post about security, this is your daily reminder to update your browser to stay safe on the internet. Up-to-date versions of Safari support AVIF images, and there have been multiple RCE vulnerabilities with known exploits fixed last year in Safari...
iphones are the scariest device to do anything important on.
I had a moment of total freakout when I realized the person across from me at lunch had an iPhone on the table. Actually he had an Android, and we continued talking like no big deal.
To be clear, we were talking about a 10-100M dollar problem, this wasnt small potatoes.
Too many exploits, I can't imagine having anything of value on an iphone.
If you can't view the images then it means you are likely using an outdated browser, all current versions of browsers support it (afaik) except Internet Explorer.[0]
...And if you are using Internet Explorer, then god help you.
[0] https://caniuse.com/avif