Users on 64-bit Windows who download Firefox can get our 64-bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less. How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.
What’s the difference between 32-bit and 64-bit?
Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. Also, with the jump from 32 to 64 bits, a security feature called Address Space Layout Randomization (ASLR) works better to protect you from attackers. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit.
How do you get 64-bit Firefox?
Firefox's features are robust and generally competitive. The most important feature in the modern Firefox is Sync.Sync now smoothly syncs your bookmarks, passwords, preferences, history, and tabs, not only with other computers, but also with your Android version of Firefox. Using Firefox ESR, IT professionals can easily configure and deploy Firefox in their organization. It is based on a regular release of Firefox for desktop and is intended for use by several kinds of organizations like schools, businesses, and all those who need extended support for mass deployments or who want to set up and maintain Firefox on.
- Type Name Size Last Modified; Dir. Dir: mar-tools/ File: Firefox Installer.en-US.exe: 315K: 21-Apr-2021 12:05: File: firefox-89.0a1.en-US.langpack.xpi: 483K: 19-Apr.
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If you’re running 64-bit Windows (here’s how to check), your Firefox may already be 64-bit. Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number:
- If you see “(32-bit)” and you are running Firefox 56.0 or older, updating to the latest Firefox version should automatically upgrade you to 64-bit.
- If you see “(32-bit)” and are running Firefox 56.0.1 or newer, then your computer may not meet the minimum memory requirement for 64-bit (3 GB RAM or more). You can still manually install 64-bit Firefox, if you choose.
If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.
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
| Quarter | Soft Freeze | Merge Date | Nightly | Beta | Release Date | Release | ESR |
|---|---|---|---|---|---|---|---|
| Q2 2021 | 2021-05-27 | 2021-05-31 | Firefox 91 | Firefox 90 | 2021-06-01 | Firefox 89 | Firefox 78.11 |
| 2021-06-24 | 2021-06-28 | Firefox 92 | Firefox 91 | 2021-06-29 | Firefox 90 | Firefox 78.12 | |
| Q3 2021 | 2021-07-22 | 2021-07-26 | Firefox 93 | Firefox 92 | 2021-07-27 | Firefox 91 | Firefox 78.13; 91.0 |
| 2021-08-19 | 2021-08-23 | Firefox 94 | Firefox 93 | 2021-08-24 | Firefox 92 | Firefox 78.14; 91.1 | |
| 2021-09-16 | 2021-09-20 | Firefox 95 | Firefox 94 | 2021-09-21 | Firefox 93 | Firefox 78.15; 91.2 | |
| Q4 2021 | 2021-10-14 | 2021-10-18 | Firefox 96 | Firefox 95 | 2021-10-19 | Firefox 94 | Firefox 91.3 |
| 2021-11-11 | 2021-11-15 | Firefox 97 | Firefox 96 | 2021-11-16 | Firefox 95 | Firefox 91.4 | |
| 2021-12-09 | 2021-12-13 | Firefox 98 | Firefox 97 | 2021-12-14 | Firefox 96 | Firefox 91.5 | |
| Q1 2022 | 2022-01-20 | 2022-01-24 | Firefox 99 | Firefox 98 | 2022-01-25 | Firefox 97 | Firefox 91.6 |
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.
Firefox 56.0.2
Past branch dates
Firefox 56 Release Notes
More details on contents of releases can be found in the release notes archive or Wikipedia: Firefox version history.
| Soft Freeze | Merge Date | Central | Beta | Release Date | Release | ESR |
|---|---|---|---|---|---|---|
| 2021-04-15 | 2021-04-19 | Firefox 90 | Firefox 89 | 2021-04-19 | Firefox 88 | Firefox 78.10 |
| 2021-03-18 | 2021-03-22 | Firefox 89 | Firefox 88 | 2021-03-23 | Firefox 87 | Firefox 78.9 |
| 2021-02-18 | 2021-02-22 | Firefox 88 | Firefox 87 | 2021-02-23 | Firefox 86 | Firefox 78.8 |
| 2021-01-21 | 2021-01-25 | Firefox 87 | Firefox 86 | 2021-01-26 | Firefox 85 | Firefox 78.7 |
| 2020-12-10 | 2020-12-14 | Firefox 86 | Firefox 85 | 2020-12-15 | Firefox 84 | Firefox 78.6 |
| 2020-11-12 | 2020-11-16 | Firefox 85 | Firefox 84 | 2020-11-17 | Firefox 83 | Firefox 78.5 |
| 2020-10-15 | 2020-10-19 | Firefox 84 | Firefox 83 | 2020-10-20 | Firefox 82 | Firefox 78.4 |
| 2020-09-17 | 2020-09-21 | Firefox 83 | Firefox 82 | 2020-09-22 | Firefox 81 | Firefox 78.3 |
| 2020-08-20 | 2020-08-24 | Firefox 82 | Firefox 81 | 2020-08-25 | Firefox 80 | Firefox 68.12; 78.2 |
| 2020-07-23 | 2020-07-27 | Firefox 81 | Firefox 80 | 2020-07-28 | Firefox 79 | Firefox 68.11; 78.1 |
| 2020-06-26 | 2020-06-29 | Firefox 80 | Firefox 79 | 2020-06-30 | Firefox 78 | Firefox 68.10; 78.0 |
| 2020-05-28 | 2020-06-01 | Firefox 79 | Firefox 78 | 2020-06-02 | Firefox 77 | Firefox 68.9 |
| 2020-04-30 | 2020-05-04 | Firefox 78 | Firefox 77 | 2020-05-05 | Firefox 76 | Firefox 68.8 |
| 2020-04-02 | 2020-04-06 | Firefox 77 | Firefox 76 | 2020-04-07 | Firefox 75 | Firefox 68.7 |
| 2020-03-05 | 2020-03-09 | Firefox 76 | Firefox 75 | 2020-03-10 | Firefox 74 | Firefox 68.6 |
| 2020-02-06 | 2020-02-10 | Firefox 75 | Firefox 74 | 2020-02-11 | Firefox 73 | Firefox 68.5 |
| 2020-01-02 | 2020-01-06 | Firefox 74 | Firefox 73 | 2020-01-07 | Firefox 72 | Firefox 68.4 |
| 2019-11-25 | 2019-12-02 | Firefox 73 | Firefox 72 | 2019-12-03 | Firefox 71 | Firefox 68.3 |
| 2019-10-14 | 2019-10-21 | Firefox 72 | Firefox 71 | 2019-10-22 | Firefox 70 | Firefox 68.2 |
| 2019-08-26 | 2019-09-02 | Firefox 71 | Firefox 70 | 2019-09-03 | Firefox 69 | Firefox 60.9; 68.1 |
| 2019-07-01 | 2019-07-08 | Firefox 70 | Firefox 69 | 2019-07-09 | Firefox 68 | Firefox 60.8; 68.0 |
| 2019-05-13 | 2019-05-20 | Firefox 69 | Firefox 68 | 2019-05-21 | Firefox 67 | Firefox 60.7 |
| 2019-03-11 | 2019-03-18 | Firefox 68 | Firefox 67 | 2019-03-19 | Firefox 66 | Firefox 60.6 |
| 2019-01-21 | 2019-01-28 | Firefox 67 | Firefox 66 | 2019-01-29 | Firefox 65 | Firefox 60.5 |
| 2018-12-03 | 2018-12-10 | Firefox 66 | Firefox 65 | 2018-12-11 | Firefox 64 | Firefox 60.4 |
| 2018-10-15 | 2018-10-22 | Firefox 65 | Firefox 64 | 2018-10-23 | Firefox 63 | Firefox 60.3 |
| Merge Date | Central | Beta | Release Date | Release | ESR |
|---|---|---|---|---|---|
| 2018-09-04 | Firefox 64 | Firefox 63 | 2018-09-05 | Firefox 62 | Firefox 60.2 |
| 2018-06-25 | Firefox 63 | Firefox 62 | 2018-06-26 | Firefox 61 | Firefox 52.9; 60.1 |
| 2018-05-07 | Firefox 62 | Firefox 61 | 2018-05-09 | Firefox 60 | Firefox 52.8; 60.0 |
| 2018-03-12 | Firefox 61 | Firefox 60 | 2018-03-13 | Firefox 59 | Firefox 52.7 |
| 2018-01-22 | Firefox 60 | Firefox 59 | 2018-01-23 | Firefox 58 | Firefox 52.6 |
| 2017-11-13 | Firefox 59 | Firefox 58 | 2017-11-14 | Firefox 57 | Firefox 52.5 |
| 2017-09-21 | Firefox 58 | Firefox 57 | 2017-09-28 | Firefox 56 | Firefox 52.4 |
| 2017-08-02 | Firefox 57 | Firefox 56 | 2017-08-08 | Firefox 55 | Firefox 52.3 |
| 2017-06-12 | Firefox 56 | Firefox 55 | 2017-06-13 | Firefox 54 | Firefox 52.2 |
| 2017-04-18 | Firefox 55 | Firefox 54 | 2017-04-19 | Firefox 53 | Firefox 45.9; 52.1 |
| Merge Date | Central | Aurora | Beta | Release Date | Release | ESR |
|---|---|---|---|---|---|---|
| 2017-03-06 | Firefox 55 | Firefox 54 | Firefox 53 | 2017-03-07 | Firefox 52 | Firefox 45.8; 52.0 |
| 2017-01-23 | Firefox 54 | Firefox 53 | Firefox 52 | 2017-01-24 | Firefox 51 | Firefox 45.7 |
| 2016-12-13 | Firefox 50.1.0 | Firefox 45.6 | ||||
| 2016-11-14 | Firefox 53 | Firefox 52 | Firefox 51 | 2016-11-15 | Firefox 50 | Firefox 45.5 |
| 2016-09-19 | Firefox 52 | Firefox 51 | Firefox 50 | 2016-09-20 | Firefox 49 | Firefox 45.4 |
| 2016-08-01 | Firefox 51 | Firefox 50 | Firefox 49 | 2016-08-02 | Firefox 48 | Firefox 45.3 |
| 2016-06-06 | Firefox 50 | Firefox 49 | Firefox 48 | 2016-06-07 | Firefox 47 | Firefox 45.2 |
| 2016-04-25 | Firefox 49 | Firefox 48 | Firefox 47 | 2016-04-26 | Firefox 46 | Firefox 38.8; 45.1 |
| 2016-03-07 | Firefox 48 | Firefox 47 | Firefox 46 | 2016-03-08 | Firefox 45 | Firefox 38.7; 45.0 |
| 2016-01-25 | Firefox 47 | Firefox 46 | Firefox 45 | 2016-01-26 | Firefox 44 | Firefox 38.6 |
| 2015-12-14 | Firefox 46 | Firefox 45 | Firefox 44 | 2015-12-15 | Firefox 43 | Firefox 38.5 |
| 2015-10-29 | Firefox 45 | Firefox 44 | Firefox 43 | 2015-11-03 | Firefox 42 | Firefox 38.4 |
| 2015-09-21 | Firefox 44 | Firefox 43 | Firefox 42 | 2015-09-22 | Firefox 41 | Firefox 38.3 |
| 2015-08-10 | Firefox 43 | Firefox 42 | Firefox 41 | 2015-08-11 | Firefox 40 | Firefox 38.2 |
| 2015-06-29 | Firefox 42 | Firefox 41 | Firefox 40 | 2015-06-30 | Firefox 39 | Firefox 31.8; 38.1 |
| 2015-06-02 | Firefox 38.0.5 | |||||
| 2015-05-11* | Firefox 41 | Firefox 40 | Firefox 39 | 2015-05-12* | Firefox 38 | Firefox 31.7; 38.0 |
| 2015-03-30* | Firefox 40 | Firefox 39 | Firefox 38 | 2015-03-31* | Firefox 37 | Firefox 31.6 |
| 2015-02-23 | Firefox 39 | Firefox 38 | Firefox 37 | 2015-02-24 | Firefox 36 | Firefox 31.5 |
| 2015-01-12* | Firefox 38 | Firefox 37 | Firefox 36 | 2015-01-13* | Firefox 35 | Firefox 31.4 |
| 2014-11-28* | Firefox 37 | Firefox 36 | Firefox 35 | 2014-12-01* | Firefox 34 | Firefox 31.3 |
| 2014-10-13 | Firefox 36 | Firefox 35 | Firefox 34 | 2014-10-14 | Firefox 33 | Firefox 31.2 |
| 2014-09-02* | Firefox 35 | Firefox 34 | Firefox 33 | 2014-09-02 | Firefox 32 | Firefox 24.8; 31.1 |
| 2014-07-21 | Firefox 34 | Firefox 33 | Firefox 32 | 2014-07-22 | Firefox 31 | Firefox 24.7; 31.0 |
| 2014-06-09 | Firefox 33 | Firefox 32 | Firefox 31 | 2014-06-10 | Firefox 30 | Firefox 24.6 |
| 2014-04-28 | Firefox 32 | Firefox 31 | Firefox 30 | 2014-04-29 | Firefox 29 | Firefox 24.5 |
| 2014-03-17 | Firefox 31 | Firefox 30 | Firefox 29 | 2014-03-18 | Firefox 28 | Firefox 24.4 |
| 2014-02-03* | Firefox 30 | Firefox 29 | Firefox 28 | 2014-02-04* | Firefox 27 | Firefox 24.3 |
| 2013-12-09 | Firefox 29 | Firefox 28 | Firefox 27 | 2013-12-10 | Firefox 26 | Firefox 24.2 |
| 2013-10-28 | Firefox 28 | Firefox 27 | Firefox 26 | 2013-10-29 | Firefox 25 | Firefox 17.0.10; 24.1 |
| 2013-09-16 | Firefox 27 | Firefox 26 | Firefox 25 | 2013-09-17 | Firefox 24 | Firefox 17.0.9; 24.0 |
| 2013-08-05 | Firefox 26 | Firefox 25 | Firefox 24 | 2013-08-06 | Firefox 23 | Firefox 17.0.8 |
| 2013-06-24 | Firefox 25 | Firefox 24 | Firefox 23 | 2013-06-25 | Firefox 22 | Firefox 17.0.7 |
| 2013-05-13 | Firefox 24 | Firefox 23 | Firefox 22 | 2013-05-14 | Firefox 21 | Firefox 17.0.6 |
| 2013-04-01 | Firefox 23 | Firefox 22 | Firefox 21 | 2013-04-02 | Firefox 20 | Firefox 17.0.5 |
| 2013-02-19* | Firefox 22 | Firefox 21 | Firefox 20 | 2013-02-19 | Firefox 19 | Firefox 17.0.3 |
| 2013-01-07* | Firefox 21 | Firefox 20 | Firefox 19 | 2013-01-08* | Firefox 18 | Firefox 10.0.12; 17.0.2 |
| 2012-11-19 | Firefox 20 | Firefox 19 | Firefox 18 | 2012-11-20 | Firefox 17 | Firefox 10.0.11; 17.0 |
| 2012-10-08 | Firefox 19 | Firefox 18 | Firefox 17 | 2012-10-09 | Firefox 16 | Firefox 10.0.8 |
| 2012-08-27 | Firefox 18 | Firefox 17 | Firefox 16 | 2012-08-28 | Firefox 15 | Firefox 10.0.7 |
| 2012-07-16 | Firefox 17 | Firefox 16 | Firefox 15 | 2012-07-17 | Firefox 14 | Firefox 10.0.6 |
| 2012-06-05 | Firefox 16 | Firefox 15 | Firefox 14 | 2012-06-05 | Firefox 13 | Firefox 10.0.5 |
| 2012-04-24 | Firefox 15 | Firefox 14 | Firefox 13 | 2012-04-24 | Firefox 12 | Firefox 10.0.4 |
| 2012-03-13 | Firefox 14 | Firefox 13 | Firefox 12 | 2012-03-13 | Firefox 11 | Firefox 10.0.3 |
| 2012-01-31 | Firefox 13 | Firefox 12 | Firefox 11 | 2012-01-31 | Firefox 10 | Firefox 10.0 |
| 2011-12-20 | Firefox 12 | Firefox 11 | Firefox 10 | 2011-12-20 | Firefox 9 | |
| 2011-11-08 | Firefox 11 | Firefox 10 | Firefox 9 | 2011-11-08 | Firefox 8 | |
| 2011-09-27 | Firefox 10 | Firefox 9 | Firefox 8 | 2011-09-27 | Firefox 7 | |
| 2011-08-16 | Firefox 9 | Firefox 8 | Firefox 7 | 2011-08-16 | Firefox 6 | |
| 2011-07-05 | Firefox 8 | Firefox 7 | Firefox 6 | |||
| 2011-06-21 | Firefox 5 | |||||
| 2011-05-24 | Firefox 7 | Firefox 6 | ||||
| 2011-05-17 | Firefox 5 | |||||
| 2011-04-12 | Firefox 6 | Firefox 5 |
*Some release dates and merge dates are rescheduled to avoid conflicts with holidays.
Mozilla Firefox 56 Free Download
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.
Firefox 56 Esr