Tab tearing is too sensitive. Tabs frequently moved to new window accidentally.




7 years ago
3 months ago


(Reporter: markleci, Unassigned)



Firefox Tracking Flags

(Not tracked)




7 years ago
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:11.0) Gecko/20100101 Firefox/11.0
Build ID: 20120208012847

Steps to reproduce:

I have noticed that since upgrading to FF10/11 (I use different versions on different machines) that the tab tearing threshold seems to have changed.

Actual results:

 I get incidents of accidentally moving tabs to new windows multiple times per day on each machine. There is no about:config setting either to change the threshold or disable tearing so the behaviour cannot be modified in any way. 

Expected results:

This has been bugged multiple times before and supposedly fixed. A better solution would be to allow either the threshold to be configurable or allow tearing to be disabled, or both!

Comment 1

7 years ago
I found out some more information on this. I found that if I drag and drop a tab (in the same place or to reposition it) then click on another program window (e.g. VLC) within a second or two, the tab is moved to a new window. Not sure if I should change the bug title based on this or not.

Comment 2

6 years ago
Bug 616130 covers not being able to disable the feature.  I'd prefer a fix for the "too sensitive" part if that's possible :)
Summary: Tab tearing in FF10 & 11 is too sensitive and cannot be disabled → Tab tearing in FF10 & 11 is too sensitive


6 years ago
Component: Untriaged → Tabbed Browser

Comment 3

6 years ago
I am experiencing this issue in Firefox 23. Running Firefox on 2nd monitor, multiple times per day I reorder tabs. When doing this inadvertently I move the mouse down to the small gap between the tabs and the address bar. Doing this causes my tab that I was dragging to be moved to a new window on my 1st monitor instead of reordering to the position I wanted it to move to.

Comment 4

6 years ago
I've been noticing the same problem, especially with pinned tabs. It gets really annoying. I am using Win7 so this isn't just an OS X issue.
Ever confirmed: true
OS: Mac OS X → All
Hardware: x86 → All
Version: 10 Branch → Trunk

Comment 5

6 years ago
Since I'm seeing this problem in FF24, I'm removing FF version notes from title.
Summary: Tab tearing in FF10 & 11 is too sensitive → Tab tearing is too sensitive. Tabs frequently moved to new window accidentally.

Comment 6

4 years ago
I am seeing this as well. Using the disable plugin


4 years ago
Duplicate of this bug: 1199965

Comment 8

4 years ago
I wonder what has changed, but this problem is quite recent for me. While it never occurred before August 2015, it now occurs quite frequently, e.g. at least 3 times today.

Comment 9

3 years ago
I got this several times a day now on Firefox 46 on Linux. It seldom happened before.

Comment 10

3 years ago
It mainly happens when I am on a page and middle-click a link that loads a heavy page. While the tab is loading, I click on it. Nothing happens for several seconds, and when the page has loaded, boom, the tab detaches itself.

When the tab is already loaded, I don't often face that behavior. I'm trying to find a way to spy mouse events. Just for the record, Firefox 46 on Linux introduced the switch from GTK 2 to GTK 3. I'm also using Ubuntu 16.04 with the default graphics environment and theme (Unity/Ambiance).

Comment 11

2 years ago
I experience this annoyance many times a day. It is terrible. 
I'm near to getting-rid of FF for this reason.
This problem was mitigated with the 'disable' plugin, and the response of developers at the time was "use that plugin".

However, that plugin no longer works with FF> 0.52, and therefore no one has a solution to mitigate this frustrating, reoccurring, and persistant issue for many users.

Can someone PLEASE at least provide an about:config way to disable the tearing/detaching of tabs by dragging, completely?  Or perhaps a sensitivity adjustment?  This happens to me many times per day...

Comment 13

7 months ago
It seems better for me on Ubuntu 18.04 with Gnome and Firefox 63.

Comment 14

4 months ago

I am also newly (last month or two, and worse during the last week or so) encountering this problem. I have not been able to notice what I am doing when this problem happens. I think all I am doing is clicking on a tab. It is always a surprise.

If I can provide more information I will post it here.

The problem is aggravated by a secondary problem: after the new window is created, there seems to be no easy way to get the tab in the new window back to the old window and then to delete the new window.

FF 65.0 (64bit), Windows 10 Home, HP laptop.

Duplicate of this bug: 1534355
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