1187656 - [e10s] Dragging tab does not create new window; breaks tab and makes blank window.

Status: RESOLVED INVALID

(Firefox :: Tabbed Browser, defect)

Description

[Matt W.]

Exact same bug as Bug 1012784 which is apparently not resolved in version 41.0a2 (2015-07-25).

How to cause this bug:
Attempt to drag a tab from a window to outside the window.

Expected result:
The tab in the original window will disappear, a new window will open, and the tab will be successfully moved to the new window.

Actual result (bug):
The tab remains in the original window, is unable to be deleted and, once another tab is switched to, one cannot switch back to that tab. Additionally, a new window is created, but with a blank tab rather than the desired tab. This only happens while e10s is enabled.

Comment 1

[Dave Townsend [:mossop]]

This was broken by bug 936092

Comment 2

[Kate Glazko]

Attachment: Dragging Window Results in Nothing

Comment 3

[Kate Glazko]

I am not sure if this is the same bug, but intermittently, dragging the tab results in nothing instead of a new window (see attachment). This is happening on the latest Nightly (7/31) on MacOS X.

Comment 4

[Kate Glazko]

[Tracking Requested - why for this release]: Appears to have user impact, tabs do not work intermittently on latest Nightly.

Setting status to 'affected' because affected in Nightly.

Comment 5

[Liz Henry (:lizzard) (relman/hg->git project)]

We can track this for now, but don't need to track it for 42 beyond aurora, since e10s is turned off in beta/release.

Comment 6

[Dave Townsend [:mossop]]

Yeah so I can't reproduce the problem listed in the first comment, all I can see is that from comment 3.

Comment 7

[Dave Townsend [:mossop]]

So I can't reproduce this and the issue I could reproduce is being tracked in bug 1156703 so I can't really work on this. Matt, can you reproduce this on a current nightly build?

Comment 8

[Matt W.]

Well I just now updated to 41.0a2 (2015-08-05) to give it a try. It's mixed results, but in short, yes.

I was able to initially drag a tag to create a new window, but when attempting to drag it back to the main window, it creates a blank new tab on the main window - this tab doesn't load and cannot be opened again. The second window still shows the tab you try to drag, along with a new tab. If you close that new tab, the entire window closes (both tabs).

So it's still a bit buggy, but unfortunately it's a bit harder to define now.

Comment 9

[Dave Townsend [:mossop]]

(In reply to Matt W. from comment #8)
> Well I just now updated to 41.0a2 (2015-08-05) to give it a try. It's mixed
> results, but in short, yes.

This is a developer channel build, not a nightly build. But I can't reproduce this on developer channel either. Can you disable all your add-ons and try again?

Comment 10

[Matt W.]

Yeah, after some tinkering with a few add-ons I've discovered it's the "Private Tab" add-on which is quite disappointing. With that add-on disabled, it works fine now. It's a shame that isn't a native feature in Firefox; private tabs would be far easier than windows.

Comment 11

[Robert Kaiser]

e10s is disabled in 42, so get this off the radar.

Comment 12

[Matt W.]

Is there a way to remove this bug or at least remove the flags on my two prior comments?

I just narrowed down a recent burst of spam at my private email to being when I first posted this bug.
I already changed my account's email but I need the commend flags GONE.