mozregression-gui

mozregression‑gui is an interactive tool that helps developers locate the specific changeset range in which a bug or regression was introduced in Firefox and other Mozilla products. It employs a binary‑search algorithm to narrow down the offending revision quickly, allowing users to step through candidate builds and pinpoint the exact point where a problem first appears.

The interface supports several Mozilla applications, including the desktop Firefox browser, Thunderbird, and the Android variants Fennec and Fenix. By automating the search process, it reduces the manual effort normally required to trace regressions across large code histories.

Designed for macOS, the application is considered stable and is intended for developers or quality‑assurance engineers who need an efficient way to identify regression ranges during testing or debugging of Mozilla software.