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Treeherder is a reporting dashboard for checkins to Mozilla projects (for example, mozilla-central). It allows users to see the results of automatic builds and their respective tests. Treeherder also provides a rich set of APIs that can be used by other projects interested in this information.

Treeherder is the successor to TBPL.

For tracking performance data, see Treeherder's sister project, Perfherder.

For tracking intermittent test failures, see Intermittent Failures View.


To make UI-only changes, you only need to perform a very simple setup running a local webserver pointing at the production backend, described here. If you wish to hack on the backend, or the UI and backend together, you will instead need to set up a Vagrant environment, using these steps.

Source and Docs

  • UI & backend: Source / Docs
  • Treeherder data submission clients:
    • Pulse: Source / docs
    • (Python and Node submission support has been removed.)

Getting in touch

What we're working on

Assigned Treeherder bugs that have been modified in the last month. View on Bugzilla

Full Query
ID Priority Component Summary Assigned to
1517747 P1 Treeherder: Job Triggering & Cancellation Triggering interactive task fails with "Taskcluster: e is undefined" ("Taskcluster: action is undefined") Cameron Dawson [:camd]
1499551 P1 Treeherder: Frontend Treeherder consuming much memory/RAM (and CPU due to GC/garbage collection?) Cameron Dawson [:camd]
1501984 P1 Treeherder: Frontend Use the React profiler to look for quick performance wins Cameron Dawson [:camd]
1510280 P1 Treeherder: Frontend TreeHerder producing multi-second UI stalls after loading more data Cameron Dawson [:camd]
1541544 P1 Treeherder: Frontend Random freezes in foreground tab, caused by treeherder work in background tab (which may be sharing the same content process) Cameron Dawson [:camd]
1169263 P2 Treeherder: Docs & Development Switch local development to use Docker Armen [:armenzg] (back on May 20th, 2019)
1550273 P2 Treeherder: Frontend [Push Health] Improve which tests need investigation Cameron Dawson [:camd]
1346567 P2 Treeherder: Infrastructure cycle_data is failing on stage/production Ionuț Goldan [:igoldan], Performance Sheriffing
1296077 P2 Treeherder: Data Ingestion Jobs stuck in the "running" state Kyle Lahnakoski [:ekyle]
1395254 P3 Treeherder: Data Ingestion Consume TaskCluster events from the standard Pulse exchanges rather than via taskcluster-treeherder Armen [:armenzg] (back on May 20th, 2019)
1542806 P3 Treeherder: Frontend [Push Health] Display classification info on hover for classified jobs Cameron Dawson [:camd]
1546076 P3 Treeherder: Job Triggering & Cancellation Increase custom backfill limit Ionuț Goldan [:igoldan], Performance Sheriffing
1277528 P3 Treeherder: Infrastructure Transition Treeherder to being supported by Operations Karl Thiessen [:kthiessen, he/him]
1551959 -- Treeherder support for osx 10.10 and 10.14 Cameron Dawson [:camd]
1553063 -- Treeherder: Frontend Fix a typo in ActionBar.jsx Wes Kocher (:KWierso)