---
title: B2G OS
slug: Archive/B2G_OS
tags:
  - B2G
  - Firefox OS
  - Gaia
  - Iniciação Firefox OS
  - Principiante
  - Resumo
  - Sinopse
  - básico
translation_of: Archive/B2G_OS
---
<div class="summary">
<p><span class="seoSummary">Firefox OS é o sistema operativo móvel desenvolvido pela Mozilla, baseado no Linux e no motor de renderização poderoso Gecko do Firefox.</span></p>
</div>

<p><strong>Firefox OS</strong> is open source software that allows developers to harness the power and flexibility of the Web to create advanced end-user applications. The <strong>entire user interface is a web app</strong>, which can<strong> </strong>display and launch other apps. A Firefox OS web app is made with HTML, CSS, and JavaScript. In addition, Firefox OS web apps have access to the device hardware and services via an Application Programing Interface (API).</p>

<p>From a product perspective, Firefox OS is Mozilla's (and our OEM partners') branding and support services applied on top of <strong>Boot to Gecko</strong> (<strong>B2G</strong>), which is the operating system's engineering codename. Boot to Gecko is developed by a team of engineers inside Mozilla plus many external contributors from the wider Mozilla/open source community.</p>

<section class="outer-apps-box" id="sect1">
<h2 id="Desenvolver_aplicações_para_o_Firefox_OS"><a href="/en-US/Apps/Build/Building_apps_for_Firefox_OS">Desenvolver aplicações para o Firefox OS</a></h2>

<p>Head over to our App Center for all the information you could possibly need on building open web apps that can be installed on Firefox OS !</p>
</section>

<div class="column-container">
<div class="column-third">
<h2 id="Guias_da_Plataforma"><a href="/en-US/docs/Mozilla/Firefox_OS/Platform">Guias da Plataforma</a></h2>

<p>Guides for platform developers on how the different components of the Firefox OS platform fit together and work.</p>

<ul>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Platform/Gaia" title="/en-US/docs/Mozilla/Firefox_OS/Platform/Gaia">Gaia</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Platform/Gonk" title="/en-US/docs/Mozilla/Firefox_OS/Platform/Gonk">Gonk</a></li>
 <li><a href="/en-US/docs/Mozilla/Gecko" title="/en-US/docs/Mozilla/Gecko">Gecko</a></li>
</ul>
</div>

<div class="column-third">
<h2 id="Criar_e_Instalar"><a href="/en-US/docs/Mozilla/Firefox_OS/Build_and_install">Criar e Instalar</a></h2>

<p>Guides covering building and installing Firefox OS on an emulator, compatible device, or desktop simulator.</p>

<ul>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Firefox_OS_build_prerequisites" title="Mozilla/Firefox_OS/Firefox OS build prerequisites">Firefox OS build prerequisites</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Preparing_for_your_first_B2G_build" title="Mozilla/Firefox_OS/Preparing for your first B2G build">Preparing for your first build</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Building" title="Mozilla/Firefox_OS/Building">Building Firefox OS</a></li>
</ul>
</div>

<div class="column-third">
<h2 id="Developer_phones"><a href="/en-US/docs/Mozilla/Firefox_OS/Developer_phone_guide">Developer phones</a></h2>

<p>Information on specific developer phones, such as tweaking, updating, recovering, and buying.</p>

<ul>
 <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Flame">Flame</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Developer_phone_guide/Updating_and_Tweaking_Geeksphone">Geeksphone</a></li>
 <li><a href="/en-US/Firefox_OS/Developer_phone_guide/ZTE_OPEN_C">ZTE Open C</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Troubleshooting">Troubleshooting</a></li>
 <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Phone_specs">Phone and device specs</a></li>
</ul>
</div>
</div>

<div class="column-container equalColumnHeights">
<div class="zone-callout">
<h2 id="Get_started_with_Firefox_OS_add-ons">Get started with Firefox OS add-ons</h2>

<p>Firefox OS add-ons are new in Firefox OS 2.5! To start developing add-ons and getting involved in the add-ons community, read <a href="/en-US/docs/Mozilla/Firefox_OS/Add-ons/Getting_started">Getting started with Firefox OS add-ons</a>.</p>
</div>

<div class="zone-callout">
<h2 id="Other_useful_pages"><strong>Other useful pages</strong></h2>

<ul>
 <li><a href="https://www.mozilla.org/en-US/styleguide/products/firefox-os/"><span class="gmw_">Firefox OS <span class="gm-spell gm_ gm_d869ea80-e62d-d8a6-6929-a6e9983578ff">styleguide</span></span></a></li>
 <li><a class="link-https" href="https://wiki.mozilla.org/B2G/FAQ" title="B2G/FAQ">Mozilla wiki FAQ</a></li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Feature_support_chart" title="/en-US/docs/Mozilla/Firefox_OS/Feature_support_chart">Feature support chart</a></li>
 <li><a href="http://firefoxosbooks.org/">Firefox OS Books</a></li>
</ul>
</div>
</div>

<div class="note">
<p><strong>Note:</strong> We are keeping track of ongoing work on Firefox OS documentation on our <a href="/en-US/docs/MDN/Doc_status/Firefox_OS">Firefox OS documentation status</a> page. If you want to help contribute to Firefox OS documentation, please have a look at this page to see what work needs tweaking!</p>
</div>

<h2 id="Subnav">Subnav</h2>

<ol>
 <li><a href="/en-US/Firefox_OS/Introduction">Introduction</a></li>
 <li><a href="/en-US/Firefox_OS/Platform" title="Documentation about the Firefox OS platform, including Gonk, Gaia, and everything in between.">Platform guide</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Platform">Platform guide overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Platform/Architecture" title="An overview of how Firefox OS is structured internally; this is primarily of interest to platform developers and people doing porting work.">Architecture overview</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Apps_architecture" title="An overview of the application model on Firefox OS.">Apps architecture</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Gonk" title="Documentation about Gonk, the operating system layer underneath Gaia. This consists of a Linux kernel and a hardware abstraction layer to which Gecko communicates."><span class="gm-spell gm_ gm_db111eae-c215-78a2-9789-97be921cbbdc">Gonk</span></a></li>
   <li><a href="/en-US/Gecko" title="Gecko is the layer of Firefox OS that provides the same open web standards implementation used by Firefox and Thunderbird, as well as many other applications.">Gecko</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Gaia" title="Documentation about Gaia, the user interface application for Firefox OS devices; this is a Web application running atop the Firefox OS software stack.">Gaia</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Gaia/Gaia_apps">Gaia apps guide</a></li>
   <li><a href="/en-US/Firefox_OS/Security" title="Documentation about security in Firefox OS">Security</a>
    <ol>
     <li><a href="/en-US/Firefox_OS/Security/Security_model">The Firefox OS security model</a></li>
     <li><a href="/en-US/Firefox_OS/Security/System_security">System security</a></li>
     <li><a href="/en-US/Firefox_OS/Security/Application_security">Application security in Firefox OS</a></li>
     <li><a href="/en-US/Firefox_OS/Security/Installing_and_updating_applications">Securely installing and updating applications</a></li>
    </ol>
   </li>
   <li><a href="/en-US/Firefox_OS/Platform/Out_of_memory_management_on_Firefox_OS">Out of memory management on Firefox OS </a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Feature_support_chart" title="A chart of which features are available in which types of Firefox OS builds.">Feature support chart</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Settings_list" title="A list of common setting names that can be used with the settings API">Settings list</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS" title="This includes documentation for building and installing the platform onto devices, as well as building the simulator and emulators.">Build and install</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS">Build and install overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS/Firefox_OS_build_process_summary">Firefox OS build process summary</a></li>
   <li><a href="/en-US/Firefox_OS/Firefox_OS_build_prerequisites" title="Steps to take before you build Firefox OS for the first time.">Build prerequisites</a></li>
   <li><a href="/en-US/Firefox_OS/Preparing_for_your_first_B2G_build" title="Before you can build Firefox OS, you need to clone the repository and configure your build.">Preparing for your first build</a></li>
   <li><a href="/en-US/Firefox_OS/Building" title="How to build Firefox OS.">Building Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS/Building_Firefox_OS_for_flame_on_OSX">Building Firefox OS for flame on OSX</a></li>
   <li><a href="/en-US/Firefox_OS/Choosing_how_to_run_Gaia_or_B2G" title="Using Gaia within Firefox, running Firefox OS on a mobile device, or in a desktop-based simulator. Which is best?">Choosing how to run Gaia or Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Building_the_Firefox_OS_simulator" title="Simulating the Gaia environment in a desktop application - more accurate than running Gaia in Firefox but not as accurate as the emulators.">Building the Firefox OS simulator</a></li>
   <li><a href="/en-US/Firefox_OS/Using_the_B2G_emulators" title="A guide to building and using the Firefox OS emulators, and when to use which emulator.">Using the Firefox OS emulators</a></li>
   <li><a href="/en-US/Firefox_OS/Installing_on_a_mobile_device" title="How to install Firefox OS on a real mobile device.">Installing Firefox OS on a mobile device</a></li>
   <li><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS/Firefox_OS_update_packages">Creating and applying Firefox OS update packages</a></li>
   <li><a href="/en-US/Firefox_OS/Building/FOTA_community_builds">Building and installing FOTA community builds</a></li>
   <li><a href="/en-US/Firefox_OS/Building_and_installing_Firefox_OS/B2G_Build_Variables_Reference_Sheet">B2G build variables reference sheet</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Developing_Firefox_OS" title="Hack the OS, customize your builds, get things the way you think they should be!">Developing Firefox OS</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Developing_Firefox_OS">Developing Firefox OS overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Developing_Firefox_OS/Filing_bugs_against_Firefox_OS">Filing bugs against Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Firefox_OS/modifying_hosts_file" title="A guide to what can be achieved by modifying the Firefox OS hosts file.">Modifying the hosts file</a></li>
   <li><a href="/en-US/Firefox_OS/Customization_with_the_.userconfig_file" title="How to customize the build and execution of Firefox OS by changing the .userconfig file.">Customization with the .userconfig file</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Firefox_OS/Customizing_the_b2g.sh_script">Customizing the b2g.sh script</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Firefox_OS/Porting" title="Information about how to port Firefox OS to new devices.">Porting Firefox OS</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Developing_Gaia">Developing Gaia</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Developing_Gaia">Developing Gaia overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Running_the_Gaia_codebase">Running the Gaia codebase</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Understanding_the_Gaia_codebase">Understanding the Gaia codebase</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Making_Gaia_code_changes">Making Gaia code changes</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Test_Gaia_code_changes">Testing Gaia code changes</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Submitting_a_Gaia_patch">Submitting a Gaia patch</a></li>
   <li><a href="/en-US/Firefox_OS/Platform/Gaia/Build_System_Primer">Gaia build system primer</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Customizing_build-time_apps">Customizing build-time apps</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Market_customizations_guide">Market customizations guide</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Customizing_the_keyboard">Customizing the keyboard in Firefox OS apps</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Localizing_Firefox_OS">Localizing Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/L10n_Best_Practices">L10n Best Practices</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/make_options_reference">Make options reference</a></li>
   <li><a href="/en-US/Firefox_OS/Developing_Gaia/Gaia_tools_reference">Gaia tools reference</a></li>
  </ol>
 </li>
 <li><a href="/en-US/docs/Mozilla/Firefox_OS/Add-ons">Firefox OS add-ons</a>
  <ol>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Add-ons">Firefox OS add-ons overview</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Add-ons/Developing_Firefox_OS_add-ons">Developing Firefox OS add-ons</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Phone_guide" title="A developer's guide to the Firefox OS developer phones available.">Firefox OS phone guide </a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Phone_guide">Firefox OS phone guide overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Phone_specs">Phone and device specs</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Geeksphone">Geeksphone</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/ZTE_OPEN">ZTE OPEN</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/ZTE_OPEN_C">ZTE OPEN C</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Flame">Flame</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Firefox_OS_device_features">General device features</a></li>
   <li><a href="/en-US/Firefox_OS/Troubleshooting" title="A guide to resolving common problems with Firefox OS.">Troubleshooting</a></li>
   <li><a href="/en-US/Firefox_OS/Developer_phone_guide/Best_practices_open_reference_devices">Best practices for open reference devices</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/TVs_connected_devices">Firefox OS on TVs and connected devices</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/TVs_connected_devices">TVs and connected devices overview</a></strong></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/TVs_connected_devices/How_to_connect_WebIDE_to_TV_%28VIErA%29">How to connect WebIDE to TV (VIERA CX/CR series)</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/TVs_connected_devices/TV_broadcast_streams_Firefox_OS">TV broadcast streams on Firefox OS products</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/TVs_connected_devices/Web_animations_on_large_screen">Web animations on large screens</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/TVs_connected_devices/TV_remote_control_navigation">Implementing TV remote control navigation</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Platform/Keyboard_events_in_Firefox_OS_TV">Keyboard events in Firefox OS TV</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/TVs_connected_devices/TV_remote_control_button_mapping_to_keyboard">TV remote control button mapping to keyboard</a></li>
   <li><a href="/en-US/docs/Web/Apps/Design/Firefox_OS_TV_UX">Firefox OS for TV UX Overview</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Releases" title="This section of the site contains release notes, explaining what new features and changes of significance to developers have landed in each new release of Gaia and Gecko on Firefox OS.">Firefox OS release notes</a>
  <ol>
   <li><a href="/en-US/Firefox_OS/Releases">Firefox OS release notes overview</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/2.2">Firefox OS 2.2 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/2.1">Firefox OS 2.1 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/2.0">Firefox OS 2.0 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/1.4">Firefox OS 1.4 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/1.3">Firefox OS 1.3 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/1.2">Firefox OS 1.2 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/1.1">Firefox OS 1.1 for developers</a></li>
   <li><a href="/en-US/Firefox_OS/Releases/1.0.1">Firefox OS 1.0.1 for developers</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Automated_testing">Automated testing</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Automated_testing">Firefox OS automated testing overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Running_Tests_on_Firefox_OS_for_Developers">Running tests on Firefox OS: A guide for developers</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/gaia-ui-tests" title="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/gaia-ui-tests">Gaia UI tests</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Gaia_integration_tests">Gaia integration tests</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Gaia_unit_tests" title="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Gaia_unit_tests">Gaia unit tests</a></li>
   <li><a href="/en-US/Firefox_OS/Automated_testing/Gaia_performance_tests">Gaia performance tests</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Mochitests" title="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Mochitests"><span class="gm-spell gm_ gm_8ea2aeb5-60d9-d796-930f-2db1e4217eaa">Mochitests</span></a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Reftests" title="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Reftests"><span class="gm-spell gm_ gm_9567400a-e713-3d43-ffa9-05fd8c3a28a2">Reftests</span></a></li>
   <li><a href="/en-US/docs/Marionette/Marionette_JavaScript_Tests" title="/en-US/docs/Marionette/Marionette_JavaScript_Tests">WebAPI tests</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/XPCShell" title="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/XPCShell"><span class="gmw_"><span class="gm-spell gm_ gm_cc093417-aacf-72e2-e15f-c15a7509a6a8">xpcshell</span> tests</span></a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/MTBF_tests">MTBF test</a></li>
   <li><a href="/en-US/docs/Marionette" title="/en-US/docs/Marionette">Marionette</a></li>
   <li><a href="/en-US/docs/Mozilla/Firefox_OS/Automated_testing/Treeherder">Treeherder</a></li>
  </ol>
 </li>
 <li><a href="/en-US/Firefox_OS/Debugging" title="A guide to debugging both your mobile apps and Firefox OS itself.">Debugging</a>
  <ol>
   <li><strong><a href="/en-US/Firefox_OS/Debugging">Firefox OS debugging overview</a></strong></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Developer_settings">Developer settings for Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Connecting_a_Firefox_OS_device_to_the_desktop">Connecting a Firefox OS device to the desktop</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Setting_up">Setting up to debug Firefox OS using Firefox developer tools</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/On-device_console_logging">On-device console logging</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Installing_ADB">Installing and using ADB</a></li>
   <li><a href="/en-US/Firefox_OS/Firefox_OS_usage_tips/taking_screenshots">Taking screenshots</a></li>
   <li><a href="/en-US/docs/Tools/WebIDE" title="A tool that allows you to install open web apps from your computer to a device capable of installing them (such as Firefox OS) - and debug any running app.">Using the WebIDE</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Firefox_OS_crash_reporting">Firefox OS crash reporting</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Debugging_OOMs">Debugging out of memory errors on Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Debugging_and_security_testing">Debugging and security testing with Firefox OS</a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Debugging_B2G_using_gdb"><span class="gmw_">Debugging B2G using <span class="gm-spell gm_ gm_7a44a2c7-9d5d-e693-57b5-a88dd9adacd8">gdb</span></span></a></li>
   <li><a href="/en-US/Firefox_OS/Debugging/Debugging_B2G_using_valgrind">Debugging B2G using Valgrind</a></li>
  </ol>
 </li>
</ol>