1106986 - The order in which new tabs as a result to clicking on links are opened in is wrong in e10s

Status: RESOLVED INVALID

(Firefox :: Tabbed Browser, defect)

Description

[(no longer active)]

STR:

1. Add a couple of pinned tabs, and open a bunch of new tabs.
2. In the first pinned tab, click on a link that opens up in a new tab.

Before e10s, the new tab would open up to the right of all of the open tabs including the non-pinned ones.  After e10s, it opens up after all of the pinned tabs but before all of the non-pinned tabs.

Comment 1

[Dão Gottwald [:dao]]

(In reply to :Ehsan Akhgari (not reading bugmail, needinfo? me!) from comment #0)
> Before e10s, the new tab would open up to the right of all of the open tabs
> including the non-pinned ones.

Not true...

Comment 2

[Mike Conley (:mconley) (:⚙️)]

Ehsan - can you reproduce with a fresh profile? It's possible you have a pref set that we're not respecting.

Comment 3

[(no longer active)]

I think you need to have the browser.allTabs.previews pref set to true in order to reproduce.

Comment 4

[Dão Gottwald [:dao]]

(In reply to :Ehsan Akhgari (not reading bugmail, needinfo? me!) from comment #3)
> I think you need to have the browser.allTabs.previews pref set to true in
> order to reproduce.

That pref has been removed long ago. Did you mean browser.ctrlTab.previews? However that pref shouldn't cause the described behavior either. Maybe an add-on did that for you.

Comment 5

[(no longer active)]

(In reply to Dão Gottwald [:dao] from comment #4)
> (In reply to :Ehsan Akhgari (not reading bugmail, needinfo? me!) from
> comment #3)
> > I think you need to have the browser.allTabs.previews pref set to true in
> > order to reproduce.
> 
> That pref has been removed long ago. Did you mean browser.ctrlTab.previews?

Ah, yes!

> However that pref shouldn't cause the described behavior either. Maybe an
> add-on did that for you.

Hmm, I don't think I have any add-ons that could cause this really, but it's hard to tell.  Just setting browser.ctrlTab.previews in a new profile didn't help reproduce the issue, the new tab always opens to the left of all non-pinned tabs.

Comment 6

[:Gijs (he/him)]

So... sounds like this is invalid? Ehsan, if you restart the profile where this used to work in non-e10s mode in safe mode, do tabs still open on the far right? Can you narrow down what preference caused this?

Comment 7

[(no longer active)]

I can definitely try, but I also agree that this is not a very important issue, so I don't want to waste time narrowing it down right now, if that's OK.  Let's just keep the bug open for now, but I can certainly live with this behavior.

Comment 8

[:Gijs (he/him)]

(In reply to :Ehsan Akhgari (not reading bugmail, needinfo? me!) from comment #7)
> I can definitely try, but I also agree that this is not a very important
> issue, so I don't want to waste time narrowing it down right now, if that's
> OK.  Let's just keep the bug open for now, but I can certainly live with
> this behavior.

This doesn't really make sense. If this only happens because of an add-on, it's clearly not a bug and should be closed. Without further information, this isn't actionable, as the default behaviour is exactly what you're seeing. I'm going to close this - please reopen if you have more information about what Firefox should be doing differently and isn't.