Other browser makers are unmoved by file-size advantages of the image format, but Google is pressing ahead. And it's saving terabytes of network usage a day on its own sites.
The leaders of Google's browser engine project conclude they won't support the animated version of Google's own new image format until performance concerns are resolved.
Google WebP engineers are encountering resistance from Google Chrome engineers about whether it's worth supporting the animated version of the image format.
Web developers and graphic artists who want to try the data-saving graphics format now have two choices of open-source plug-ins for Photoshop.
Google is happy enough with WebP to spread it across the company, including the Google+ app on Android. Also: new features coming to WebP.
The original version of this story misidentified which browsers support Google's WebP image format. WebP currently is supported in Chrome, Opera, and Android.
Engineers for the powerful Web site like Google's image format and are encouraging Mozilla to support it in Firefox.
It's a major endorsement for the file format, but some social-network members are upset to have lost their flexible, sharable JPEGs.
Firefox programmers reconsidered their opposition to Google's image format for two reasons: new data showing graphics files 30 percent smaller for faster page loads -- and that the info came from a close ally.
The Firefox developer hasn't committed to support WebP, but it's investigating after large Web sites expressed interest. Also: Google upgrades WebP with new version 0.3.0 release.