Your app is getting slower over time. Scroll position jumps. Tabs are consuming 800 MB of RAM. You open Task Manager and watch Chrome eat memory like it’s buffet day. Something is leaking — but where? The Chrome DevTools Memory tab is sitting right there, and most developers either ignore it or open it once, get confused by “Shallow Size” and “Retainers,” and quietly close it. This guide is for people who want to actually use it.