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Package for handling Mozilla Archive files.

Project description

Package for handling Mozilla Archive files. MAR file format is documented at

  • Free software: MPL 2.0 license


To list the contents of a mar:

mar -t complete.mar

To list the contents of a mar with extra detail:

mar -T complete.mar

To extract a mar:

mar -x complete.mar

To extract, and uncompress a bz2 compressed mar:

mar -j -x complete.mar

To verify a mar:

mar -k :mozilla-nightly -v complete.mar

To create a mar, using bz2 compression:

mar -j -c complete.mar *

To create a mar, using xz compression:

mar -J -c complete.mar *

To create a signed mar:

mar -J -c complete.mar -k private.key -H nightly -V 123 tests


pip install mar



To run the all tests run:



3.2.0 (2022-09-01)

  • Dropped python3.6 support

  • Added python3.9 and python3.10 support

  • Fixed file descriptor leaks

3.1.0 (2019-02-19)

  • Added new autograph stage public key

  • Dropped python3.5 support

3.0.0 (2018-09-06)

  • Support extracting mar hash for external signing, and injecting signatures into unsigned files.

  • File modes are set on extraction

  • mar -v can now verify that unsigned mar files are well formed

  • Added helper productinfo property to MarReader to allow convenient access to the product information information

  • Internal signing API changed: * Got rid of Verifier/Signer classes

  • Internal API for the mar format changed: * offets added for the beginning and end of signature and additional blocks * correctly represent additional section padding

  • Support MAR files without additional sections

2.3.0 (2018-07-23)

  • Remove deprecated usage of signature generation and verification in cryptography library. This changes the type of object returned by the make_signer and make_verifier functions.

2.2.3 (2018-01-18)

  • Update dependencies; dependencies are now also pinned in

  • Correct the key size in exception messages

  • Fix for construct 2.8.22 and higher

  • Fix for hypothesis 3.44.16

2.2.2 (2017-07-06)

  • Fix bug when writing MAR files: the index size was incorrect

  • Support writing interable streams

  • Add new Mozilla SHA384 public keys

2.2.1 (2017-08-23)

  • Output compression and signature type

2.1.0 (2017-06-28)

  • Implement XZ compression

2.0.0 (2017-01-12)

  • First release on PyPI.

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