Mozilla Firefox Description. Mozilla Firefox is a free, fast and efficient cross-platform web browser and one of the most popular browsers in use. Firefox boasts speed and tabbed. Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows a number of additional features that work with you to help you get the most out of your time online. Gather in this interactive, online, multi-dimensional social space. Firefox Developer Edition. Get the Firefox browser built just for developers. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Firefox makes it to version 54, Mozilla dubs it 'the best Firefox' Mozilla has announced the latest update to its popular web browser. Firefox is now up to version number 54 with changes that, according to the company, make it 'the best Firefox in history' thanks to an important performance tweak in the form of multiprocess support when loading tabs.

This schedule is based on the current RapidRelease plan. Future dates may change if the process changes. Code is not always released to users on the same day as the branch migration. The release to users may be a few days later, to allow for manual testing and sign-off. Thunderbird tracks the ESR schedule column per Thunderbird release info.

Calendars

This wiki page may not always have the most current information. Please refer to one of the following calendars for up-to-date scheduling:

• Firefox Merge/Release Dates (ICS for Thunderbird/Lightning or your calendar app) (low noise)
• Firefox Merge/Release Full Scheduling Calendar (ICS) (highly detailed - 99.99% up to date)

Future branch dates

The Nightly soft freeze is typically during the week prior to merge day. During this period high-risk patches should avoid landing until after the Nightly version bump lands on mozilla-central on merge day.

Past branch dates

More details on contents of releases can be found in the release notes archive or Wikipedia: Firefox version history.

*Some release dates and merge dates are rescheduled to avoid conflicts with holidays.

Notes:

• Four week schedule starting late 2019.
• Irregular schedule targeting six to eight week intervals, adjusting for holidays, starting 2016.
• Six week schedule from 2011 to 2015 (with some dates delayed to avoid conflicts with holidays).
• Firefox 5 was on a slightly different schedule. It spent five weeks each on Aurora and Beta while later releases spent six weeks on each branch.

The Mozilla SSL Configuration GeneratorMozilla maintains three recommended configurations for servers using TLS. Pick the correct configuration depending on your audience:

• Modern: Modern clients that support TLS 1.3, with no need for backwards compatibility
• Intermediate: Recommended configuration for a general-purpose server
• Old: Services accessed by very old clients or libraries, such as Internet Explorer 8 (Windows XP), Java 6, or OpenSSL 0.9.8

The ordering of cipher suites in the Old configuration is very important, as it determines the priority with which algorithms are selected.

OpenSSL will ignore cipher suites it doesn't understand, so always use the full set of cipher suites below, in their recommended order. The use of the Old configuration with modern versions of OpenSSL may require custom builds with support for deprecated ciphers.

Modern compatibility

For services with clients that support TLS 1.3 and don't need backward compatibility, the Modern configuration provides an extremely high level of security.

• Cipher suites (TLS 1.3): TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
• Cipher suites (TLS 1.2): (none)
• Protocols: TLS 1.3
• Certificate type: ECDSA (P-256)
• TLS curves: X25519, prime256v1, secp384r1
• HSTS: max-age=63072000 (two years)
• Certificate lifespan: 90 days
• Cipher preference: client chooses

• Rationale:
  • All cipher suites are forward secret and authenticated
  • The cipher suites are all strong and so we allow the client to choose, as they will know best if they have support for hardware-accelerated AES
  • We recommend ECDSA certificates using P-256, as P-384 provides negligible improvements to security and Ed25519 is not yet widely supported

Intermediate compatibility (recommended)

For services that don't need compatibility with legacy clients, such as Windows XP or old versions of OpenSSL. This is the recommended configuration for the vast majority of services, as it is highly secure and compatible with nearly every client released in the last five (or more) years.

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• Cipher suites (TLS 1.3): TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
• Cipher suites (TLS 1.2): ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
• Protocols: TLS 1.2, TLS 1.3
• TLS curves: X25519, prime256v1, secp384r1
• Certificate type: ECDSA (P-256) (recommended), or RSA (2048 bits)
• DH parameter size: 2048 (ffdhe2048, RFC 7919)
• HSTS: max-age=63072000 (two years)
• Certificate lifespan: 90 days (recommended) to 366 days
• Cipher preference: client chooses

• Rationale:
  • All cipher suites are forward secret and authenticated
  • TLS 1.2 is the minimum supported protocol, as recommended by RFC 7525, PCI DSS, and others
  • ECDSA certificates are recommended over RSA certificates, as they allow the use of ECDHE with Windows 7 clients using Internet Explorer 11, as well as allow connections from IE11 on Windows Server 2008 R2
  • The cipher suites are all strong and so we allow the client to choose, as they will know best if they have support for hardware-accelerated AES
  • Windows XP (including all embedded versions) are no longer supported by Microsoft, eliminating the need for many older protocols and ciphers
  • Administrators needing to provide access to IE 11 on Windows Server 2008 R2 and who are unable to switch to or add ECDSA certificates can add TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  • While the goal is to support a broad range of clients, we reasonably disable a number of ciphers that have little support (such as ARIA, Camellia, 3DES, and SEED)
  • 90 days is the recommended maximum certificate lifespan, to encourage certificate issuance automation

Old backward compatibility

This configuration is compatible with a number of very old clients, and should be used only as a last resort.

• Cipher suites (TLS 1.3): TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
• Cipher suites (TLS 1.0 - 1.2): ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA
• Protocols: TLS 1.0, TLS 1.1, TLS 1.2, TLS 1.3
• TLS curves: X25519, prime256v1, secp384r1
• Certificate type: RSA (2048-bits)
• Certificate curve: None
• DH parameter size: 1024 (generated with openssl dhparam 1024)
• HSTS: max-age=63072000 (two years)
• Certificate lifespan: 90 days (recommended) to 366 days
• Cipher preference: server chooses

• Rationale:
  • Take a hard look at your infrastructure needs before using this configuration; it is intended for special use cases only
  • If possible, use this configuration only for endpoints that require it, segregating it from other traffic
  • SSLv3 has been disabled entirely, ending support for older Windows XP SP2 clients. Users requiring support for Windows XP SP2 may use previous versions of this configuration, with the caveat that SSLv3 is no longer safe to use
  • This configuration requires custom builds to work with modern versions of OpenSSL, using enable-ssl3, enable-ssl3-method, enable-deprecated, and enable-weak-ssl-ciphers
  • Most ciphers that are not clearly broken and dangerous to use are supported

Latest Version Of Firefox

Mozilla also maintains these recommendations in JSON format, for automated system configuration. This location is versioned and permanent, and can be referenced in scripts and tools. The file will not change, to avoid breaking tools when we update the recommendations.

We also maintain a rolling version of these recommendations, with the caveat that they may change without warning and without providing backwards compatibility. As it may break things if you use it to automatically configure your servers without review, we recommend you use the version-specific file instead.

Mozilla Firefox Version 22

Mozilla Firefox Version 2