When testing APNG for a local project last year which involved only Firefox, I was trying to save some space and have better color support using APNG. I found

When testing APNG for a local project last year which involved only Firefox, I was trying to save some space and have better color support using APNG. I found it to be quite buggy, slow, and even occasionally leading to crashes. I switched to webp. APNG was never given enough love, despite being a very useful format.