---
id: mozleak
version: "0.2"
license: MPL
license_treatment: copyleft
maintenance: abandoned
---

# mozleak — Library for extracting memory leaks from leak logs files

License: copyleft · Maintenance: abandoned · Downloads: 111.2K/mo

## 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 above — 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

pip install mozleak
uv add mozleak
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: unspecified
- Install friction: low
- Maintenance: abandoned
- Downloads: 111.2K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

memory leak detection, leak log parsing, mozilla testing tools, memory profiling logs, leak analysis, mozilla, memory-profiling, legacy

[View on SkillFed](https://skillfed.io/packages/mozleak) · [View on PyPI](https://pypi.org/project/mozleak/)