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What is Ubiquity?

Ubiquity was a Mozilla Labs experiment that was in development from 2008 to 2009. Its purpose was to explore whether a radically different type of interface to the Web — a task-centric, natural-language-based command line — could help us get common Web tasks done faster.

Development is currently on indefinite hiatus. We will most likely revisit the experiment at some point in the future. In the meantime, the Ubiquity extension for Firefox is still available for download (see below). Also, some of the ideas from Ubiquity are being implemented in Jetpack.

You can learn more about Ubiquity by reading Atul's blog post entitled Ubiquitous Interfaces, Ubiquitous Functionality, or try it out via the User Tutorial.

Other informative blog posts about Ubiquity include:

Trusting Functionality by Atul

Mouse-Based Ubiquity

Sharing Streamable Functionality by Aza

Language-Based Interfaces, part 1: The Problem by Jono

Our Presentation at Labs Night by Jono

Why Verbs? by Jono

Selected Press


For Firefox 14.0 and up

Install Ubiquity 0.6.2 for Firefox 14 and up

Install the latest beta of Ubiquity - Maintained by community member Satyr

For Older Versions of Firefox

Install latest version of Ubiquity for Firefox 3.5

Install the latest beta of Ubiquity for Firefox 3.5

Install older versions (if the current version is breaking for you)


General Google Group/mailing list - Useful for discussion of command development, user interface, feature suggestions, and other high-level discussions.

Core Google Group/mailing list - Discussion of low-level internals of Ubiquity.

Get Satisfaction - Ideas, Complaints, Forum, and "Customer Service"

#ubiquity - Live internet relay chat discussion.

Good-for-beginners bugs - bug tickets which may be good for a Ubiquity beginner to attack

Frequently Encountered Bugs - bugs that get reported a lot on the mailing list and Get Satisfaction that would make lots of people happy if they got fixed

Commands In The Wild Add links to your commands here.

Issue Tracker - Used to report/discuss bugs and submit patches for Ubiquity.

Trac Components and Keywords - Keywords and categories to use when filing Trac tickets.

Ubiquity HG Repository - The Mercurial source code repository for Ubiquity.

Buildbot - Continuous integration that runs Ubiquity unit tests after every commit. If the tests fail, they're reported immediately to the mailing list.




Ubiquity User Tutorial

The latest Command Authoring Tutorial (for command authors using a Ubiquity source checkout); or the frozen Ubiquity 0.5 Command Authoring Tutorial for those using version 0.5 of the extension.

Command Update Tutorial for how to take a command written for Ubiquity 0.1 and make it work in Ubiquity 0.5.

Locked-Down Feed Tutorial

Secure Coding Practices

Skinning Ubiquity Tutorial

Ubiquity Code Documentation - Generated from the latest source code via Code Illuminated.

Contributing to Core Development

Localizing Ubiquity to Your Language

Localizing Commands to Your Language

Noun-types Reference

Bundled libraries

Using jQuery in Ubiquity

JavaScript style guide

Ubiquity 0.1.3 Architecture



Help Document the 0.5 code here - working copies of the wiki documentation for the latest source version

Help us improve the built-in command documentation by editing this page

Help us improve the interactive tutorial by editing this page


Planet Ubiquity








mitcho (see also his future topics to blog on)





@mozillaubiquity: The main source of news & info about the Ubiquity project via Twitter. Be sure to follow.

@azaaza: Mozilla's co-lead developer for the Ubiquity project

@toolness: Mozilla's co-lead developer for the Ubiquity project

@reybango: Evangelist for the Ubiquity project

@theunfocused: Fellow Mozillian Blair McBride

abi @abi: Created the Devo Firefox extension which provided a keyboard command launcher similar to what Ubiquity is today.

@fernando_takai: Major supporter of Ubiquity.

@mitchoyoshitaka: Resident linguist

@bpung: Mozilla labs intern, developer for Ubiquity

@ChristianSonne: Developer for Ubiquity

The Herd

The Herd keeps track of all Ubiquity scripts. For more information, see the following links:

Herd HG Repository

Herd Developer FAQ

CouchDB - database used for Herd

The Herd-The Herd Itself.


Ubiquity Roadmap - from 0.5 to 1.0

Command Suggestions - use this page to suggest new Ubiquity commands you'd like to see.

Proposals for New Nouns

Proposals for new "Magic Words"

Ubiquity Commands Center - an idea for a web-panel that maintains a database of Ubiquity scripts.

Ubiquity Trust Network - a proposal for a distributed trust network

Ubiquity In Thunderbird - let's make Ubiquity work in Thunderbird!

0.2 Roadmap Proposals - Brainstorming on possible directions to go for Ubiquity 0.2.

0.2 Design: UI and Security Extensibility - Design-related thoughts on how to make Ubiquity extensible in regards to security/command-execution and access by other Firefox UIs.

Proposed commands for uplift into Ubiquity 0.2

Writing commands with semantic roles - would enable commands to be automagically localized

The Great Renaming -- proposal for renaming all built-in commands for consistency and to work with the Overlord Verbs system.

Internationalization and Localization

internationalization and localization pages

Ubiquity i18n Google Group/mailing list for discussion of internationalization and localization topics

Command Localization Tutorial for how to translate commands to your language

Release Notes

Ubiquity 0.5.4 Release Notes

Ubiquity 0.5.3 Release Notes

Ubiquity 0.5.2 Release Notes

Ubiquity 0.5.1 Release Notes

Ubiquity 0.5 Release Notes

Ubiquity 0.1.9 Release Notes

Ubiquity 0.1.8 Release Notes

Ubiquity 0.1.7 Release Notes

Ubiquity 0.1.6 Release Notes

Ubiquity 0.1.5 Release Notes

Ubiquity 0.1.3 Release Notes

Ubiquity 0.1.2 Release Notes

Ubiquity 0.1.1 Release Notes