1274787 - [Session Restore] Gmail pinned tabs are not restored most of the times

Status: RESOLVED DUPLICATE of bug 1275917

(Firefox :: Session Restore, defect)

Description

[Kostas]

To reproduce:

in Nightly x64 builds 2016-05-20 and 2016-05-21 in win10 x64,
in my everyday profile, 
with e10s disabled, 
having these addons:  Greasemonkey, Adblock Plus, EHH for ABP, Reddit Enhancement Suite,
and having set in Options|General|When Nightly Starts|Show my windows from last time,
among other pinned tabs, I have 2 Gmail tabs (and 1 inbox.google.com tab).

Well, at session restore,
all other pinned tabs (incl. inbox.google.com) are restored ok every single time,
but the 2 Gmail tabs most of the times are not restored:
the URL appears ok in the awesomebar 
but the page remains empty and the spinning icon never stops.
Screenshot: https://i.imgur.com/Om8X6JN.jpg
When this occurs, I don't see any relevant entry in Web Console.



PS. I can't reproduce it in a clean profile.

Comment 1

[Kostas]

Latest changeset: https://hg.mozilla.org/mozilla-central/rev/f1f2644d34440fe38c098e323bf570e09197e51a

I don't know if that's related to the issue described in here http://forums.mozillazine.org/viewtopic.php?p=14608385#p14608385
which was fixed by backing out bug 1267910,
but, I have updated to the latest Nighly (see changeset link) which contains the above backout, and the issue remains.