Writing efficient user interfaces is the main maxim, here at Vimperator labs. We often follow the Vim way of doing things, but extend its principles when necessary. Towards this end, we've created the liberator library for Mozilla based applications, to encapsulate as many of these generic principles as possible, and liberate developers from the tedium of reinventing the wheel.

Until now, because of time constraints, we have focused solely on these Mozilla-based applications:


Vimperator, the flagship project from Vimperator labs, creates a Vim-like Firefox.

Muttator is to Thunderbird what Vimperator is to Firefox. Combines the best aspects of Vim and Mutt.

Xulmus liberates Songbird by adding Vim and CMus features to it.

Your project here...
If you would like other host applications, such as Instantbird or Sunbird to make use of our liberator library, feel free to contact us.

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  • Vimperator 3.3 and Muttator 1.1 released!

    Nothing major but mostly fixes for newer Firefox and Thunderbird versions. Full changelog is here. and here.

    Posted on Sun, 13 Nov 2011 00:00:00 Z by
  • Muttator 1.0 released!

    We are proud to announce the first 1.x version of Muttator: Muttator 1.0. It features a few new distinct mail specific features over the 0.6 release, but mostly it benefeits from a lot of infrastructure work which went into the 3.x series of Vimperator.

    Furthermore, compatibility with new Thunderbird versions was established. Full changelog is here.

    Posted on Mon, 13 Jun 2011 00:00:00 Z by
  • Vimperator 3.2 released!

    Vimperator 3.1 was just released a few weeks ago, but development is quick currently and we are pleased to already announce Vimperator 3.2, this time without a special codename though.

    Posted on Fri, 3 Jun 2011 00:00:00 Z by