For printing we need Document::CreateStaticClone to work for out-of-process subdocuments. Specifically, we need the iframe's embedded document to be created by a call to Document::CreateStaticClone on the root document, and we need some place for that static clone to live...(normally it would belong to the nsPrintJob, but we don't want to created a nested nsPrintJob instance).

Bugbug thinks this bug is a enhancement, but please change it back in case of error.

Tentatively moving all bugs whose summaries mention "Fission" (or other Fission-related keywords) but are not assigned to a Fission Milestone to the "?" triage milestone.

This will generate a lot of bugmail, so you can filter your bugmail for the following UUID and delete them en masse:

0ee3c76a-bc79-4eb2-8d12-05dc0b68e732

Printing blocks enabling Fission in Nightly (M6)

Tracking for Fission Nightly (M6c)

Fission Nightly blocker

The way Emilio is changing things to work in bug 1636728 makes this WONTFIX. The coordination of static cloning across content process will happen at a higher level.