Life & fun · December 10, 2025
Wirebrowser – A JavaScript debugger with breakpoint-driven heap search
Hi HN! I'm building a JavaScript debugger called Wirebrowser. It combines network inspection, request rewriting, heap snapshots, and live object search. The main experimental feature is BDHS (Breakpoint-Driven Heap Search): it hooks into the JavaScript debugger and automatically captures a heap snapshot at every pause and performs a targeted search for the value or structure of interest. This reveals the moment a value appears in memory and the user-land function responsible for creating it. Another interesting feature is the Live Object Search: it inspects runtime objects (not just…
In plain words
Wirebrowser is a JavaScript debugger that combines network inspection, request rewriting, and heap analysis. Its main feature, Breakpoint-Driven Heap Search, automatically captures heap snapshots when the debugger pauses and searches for specific values or structures, identifying when they appear in memory and which function created them. It also offers Live Object Search to inspect runtime objects using regex and similarity matching, with the ability to modify objects directly during debugging sessions.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN! I'm building a JavaScript debugger called Wirebrowser. It combines network inspection, request rewriting, heap snapshots, and live object search. The main experimental feature is BDHS (Breakpoint-Driven Heap Search): it hooks into the JavaScript debugger and automatically captures a heap snapshot at every pause and performs a targeted search for the value or structure of interest. This reveals the moment a value appears in memory and the user-land function responsible for creating it. Another interesting feature is the Live Object Search: it inspects runtime objects (not just snapshots), supports regex and object similarity, and lets you patch objects directly at runtime. Whitepaper: https://fcavallarin.github.io/wirebrowser/BDHS-Origin-Trace Feedback very welcome, especially on whether BDHS would help your debugging workflow.
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