Soft code freeze for Firefox 67 starts March 11

Pascal Chevrel pchevrel at mozilla.com
Fri Mar 8 08:45:35 UTC 2019


Hi all,

On March 11, we will be merging Firefox 67 from mozilla-central to beta
for the first time. In order to avoid invalidating the testing we get
out of late Nightly and the early Developer Edition builds and to ensure
that we can roll out Beta 67 to a wider audience with confidence, we'd
like to ask that any risky changes be avoided from March 11 until after
the version bump to 68 on March 18. Please also be mindful of any
landings late this week or over the weekend as there will be very little
buffer between the first merge and shipping the 67.0b1 builds.

Some reminders for the soft code freeze period:

Do:
- Be ready to backout patches that cause crash spikes, new crashes,
severe regressions
- Monitor new regressions and escalate merge blockers
- Support release management by prioritizing fixing of merge blockers

Do Not:
- Land a risky patch or a large patch
- Land new features (that affects the current Nightly version) — be
mindful that code behind NIGHTLY_BUILD or RELEASE_OR_BETA ifdefs can
lead to unexpected CI results
- Flip prefs that enable new Features that were untested in Nightly cycle
- Plan to kick off new experiments that might impact a feature's merge
readiness

Please let us know if you have any questions/concerns.

Thanks,

Release Management Team

-- 
Pascal Chevrel
Firefox Release Manager


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