EWWW Image Optimizer

The built-in EWWW Image Optimizer compatibility syncs images optimised by EWWW with Google Cloud Storage. The plugin describes it as limited support in CDN mode: it restores the local image before compression when needed and uploads any image size that is missing from the bucket after optimisation.

Enable it on the Compatibility tab of the WP-Stateless settings page, or with the WP_STATELESS_COMPATIBILITY_EWWW constant. It is not supported in Stateless mode.

Tested with EWWW Image Optimizer 7.2.1.