mozleak

Library for extracting memory leaks from leak logs files

mozleak v0.2 111.2K downloads/30d#12,426 on PyPI

Copyleft license MPL Abandoned released 2018-12-20

What it is and what it does

Mozleak is a Python library for parsing and extracting memory leak information from Firefox leak log files. It was designed as part of Mozilla's mozbase testing infrastructure to help developers and QA engineers identify and analyze memory leaks during Firefox development and testing.

The package has been unmaintained since 2018-12-20 and is written exclusively for Python 2.7. It has no runtime dependencies, making installation straightforward, but its age and lack of Python 3 support make it unsuitable for modern development workflows unless you are working with legacy Firefox testing infrastructure that still relies on Python 2.

Use it for:

Analyzing memory leak logs from Firefox automated testing pipelines in legacy Python 2 environments
Extracting leak summaries from raw leak log files for historical Firefox builds
Integrating leak detection into Mozilla's mozbase testing framework if still in use

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Extracts memory leaks from leak log files, primarily for Firefox and Mozilla testing workflows.

No. The package is abandoned since 2018-12-20, targets only Python 2.7, and has not been updated since. Unless you are maintaining legacy Python 2 Firefox testing infrastructure, seek a modern alternative or current Mozilla testing tools.

Install

mozleak on PyPI

pip

pip install mozleak

uv

uv add mozleak

poetry

poetry add mozleak

Installing mozleak

Before you install

Low install friction with no runtime dependencies. Package is abandoned since its latest release on 2018-12-20 and targets Python 2.7 only.

License in practice

Licensed under MPL (copyleft). Use is permitted but derivative works and modifications must be distributed under the same license terms.

Quickstart

pip install mozleak
import mozleak
# Parse leak logs using mozleak's leak extraction functions

Requires Python 2.7; no Python 3 support.

Verify before relying

Whether the package still works with modern Firefox or current leak log formats
Availability of leak log file format documentation or examples in the fact sheet
Whether any Mozilla projects still actively use this package
What specific leak extraction functions are available and how to call them

Package facts

License	MPL (copyleft)
Python support	not specified
Install friction	low — pure-Python wheel
Runtime dependencies	none
Maintenance	abandoned — 2,794 days since the last release
First released	2017-04-09
Downloads	111,228/month — #12,426 on PyPI (30-day window, as of 2026-08-14)
Known vulnerabilities	none known (OSV.dev, checked 2026-08-14)