+++ This bug was initially created as a clone of Bug #1279568 +++ When we will have multiple private browsing sessions, we can use them instead using userContextId for the thumbnail generation in about:newtab.
Priority: -- → P3
Summary: cookies being loaded from about:newtab → cookies being loaded from about:newtab should use a privatebrowsing mode value >1 in the OriginAttributes instead of a temp userContextId
As offline discussion with Ehsan, this bug is blocked by bug 1271686. And quote what Ehsan said: "enough of this stuff has already landed so whoever wants to work on this should be able to start immediately."
Depends on: 1271686
Just to clarify what we mean here, my suggestion is to load about:newtab in private mode, always, not modify anything only on cookies.
(In reply to :Ehsan Akhgari from comment #2) > Just to clarify what we mean here, my suggestion is to load about:newtab in > private mode, always, not modify anything only on cookies. So about:newtab would be in a private mode that is designated for only top level about:newtab, and no other top level document loads. Correct? It would be a different private mode than the private mode used in Private Browsing Mode.
Whiteboard: [userContextId][domsecurity-backlog][OA] → [userContextId][domsecurity-backlog3][OA]
Bulk change per https://bugzilla.mozilla.org/show_bug.cgi?id=1401020
status-firefox57: --- → fix-optional
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