Checklist

Ship the l10n milestone ^DESKTOP ^MOBILE ^RELEASE ^BETA
~~Set reserved_slaves ^DESKTOP ^MOBILE ^RELEASE ^BETA ^ESR~~
~~Check to make sure you have all of the different types of slaves that you need ^DESKTOP ^MOBILE ^RELEASE ^BETA ^ESR~~
Start the automation ^DESKTOP ^MOBILE ^RELEASE ^BETA ^ESR
Reset reserved_slaves and unlock slaves ^DESKTOP ^MOBILE ^RELEASE ^BETA ^ESR
Push to mirrors ^DESKTOP ^RELEASE
Run pushsnip ^DESKTOP ^RELEASE ^BETA ^ESR
Desktop post-release tasks ^DESKTOP ^RELEASE

Notes

Set reserved slaves to 2 (windows is our slowest platform and we only 2 slaves available for repacks, so there's no benefit to end2end time by setting it higher)
Moved 2 64-bit linux ix slaves, 1 64-bit windows slave, and 2 32-bit windows slaves to bm34 to make sure we have enough of the right slaves to do the release.