Publisher Tag Debugger

A modern browser extension for debugging Google Ad Manager (GAM) publisher tags. Inspect ad slots, targeting parameters, and response information directly in your browser's side panel. Features: - Ad Slot Detection - Automatically scans pages for Google Ad Manager slots via the googletag API - Slot Analysis - View ad unit paths, sizes, network codes, and MCM parent IDs - Fill Status - Instantly see which slots are filled vs. empty with stats dashboard - Targeting Inspector - Examine page-level and slot-level targeting key-value pairs - Response Details - View advertiser, campaign, creative, and line item IDs for filled slots - Visual Highlighting - Click to highlight any slot on the page with an animated overlay - Dark Mode - Automatic system preference detection with manual toggle Cross-Browser - Works on Chrome (MV3) and Firefox (MV2)