Using the Save-Data client hint with Bolt BetterThumbs to send smaller images to users on low bandwidth or slow connections
With Chrome now supporting Animated PNG as of Chrome 59 we have two image formats that can supplant the old and tired GIF format. Varying posts and sites have different conclusions on when to use APNG versus an animated Webp. In all my findings (linked below where the source Gif comes from) animated webp beats apng in filesize each and every time. Sometimes by not very much.
Opmitimizing MP4 and WebM videos for the web and converting MP4 to WebM
Resources I used to create a Service Worker. How to develop them without an SSL cert over regular HTTP in Firefox and Chrome and how I fixed my critical CSS to load without calling the server side code.