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No bug - document 127.0 windows watershed. r=bhearsum DONTBUILD

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Differential Revision: https://phabricator.services.mozilla.com/D216547
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Julien Cristau 2024-07-15 13:05:53 +00:00
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docs/update-infrastructure/index.md
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@ -6,7 +6,7 @@ Firefox, Thunderbird, and Mozilla VPN updates rely on [backend service known as
Most of the time, an update will take an application directly from whatever version it is currently running to the latest version of that application. This is greatly preferred, both to save time, bandwidth, reduce restarts, and increase security by ensuring we get to the latest version of something as quickly as possible. Unfortunately, sometimes we must route through an intermediate version first, typically the version that is currently running does not provide Balrog with enough information to accurately serve a correct update to the latest version. These are colloquially known as "watershed" updates. (This name comes from the fact that these updates change something about the update process itself, making them a kind of "watershed moment" for updates.)
At the time of writing (August, 2023), we currently have the following watershed updates in place for Firefox's release channel:
At the time of writing (July, 2024), we currently have the following watershed updates in place for Firefox's release channel:
* 12.0, all platforms. In this release [we added support for distinguishing the running and supported architectures in macOS builds in the update URL](https://bugzilla.mozilla.org/show_bug.cgi?id=583671).
* 43.0.1, Windows only. This release was [preparation for desupporting SHA-1 hashes in our Windows builds](https://bugzilla.mozilla.org/show_bug.cgi?id=1234277).
* 45.0.2, Linux only. We added support for [sending the GTK 3 version to the update URL](https://bugzilla.mozilla.org/show_bug.cgi?id=1227023).
@ -15,6 +15,7 @@ At the time of writing (August, 2023), we currently have the following watershed
* 57.0.4[^2], Linux & Mac only. We [added support for LZMA compression to the updater](https://bugzilla.mozilla.org/show_bug.cgi?id=641212) and [swapped to new MAR signing keys](https://bugzilla.mozilla.org/show_bug.cgi?id=1324498). (Note: Windows was not required here because they picked up this change in the above 56.0 watershed.)
* 72.0.2, all platforms. This is a required version due to a [necessary two-step password database migration](https://bugzilla.mozilla.org/show_bug.cgi?id=1615382).
* 109.0.1, macOS only. This updates the channel-prefs.js file (normally excluded from updates) due to [signature issues](https://bugzilla.mozilla.org/show_bug.cgi?id=1804303).
* 127.0, Windows only. The issuer for our code-signing certificate changed, [requiring an updated Mozilla Maintenance Service](https://bugzilla.mozilla.org/show_bug.cgi?id=1894689).
[^1]: Here is a sample URL: https://aus5.mozilla.org/update/3/Firefox/85.0/20200518093924/WINNT_x86_64-msvc-x64/en-US/release/Windows_NT%2010.0.0.0.18363.1016%20(x64)/default/default/update.xml