The folks at Interactive Advertising Bureau (IAB) are in a sour mood, judging by this report. They find that actions from Apple, Firefox, and others have already removed half of the “signal fidelity” once provided by third-party identifiers, with even greater losses on the way. Yet IAB sees state-level privacy regulation as an even greater threat. Worse still, companies are doing a poor job in getting ready for the new situation. Color them glum.