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!
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.
Bug 616130 covers not being able to disable the feature. I'd prefer a fix for the "too sensitive" part if that's possible :)
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.
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.
Since I'm seeing this problem in FF24, I'm removing FF version notes from title.
I am seeing this as well. Using the disable plugin https://addons.mozilla.org/en-US/firefox/addon/bug489729-disable-detach-and-t/
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.
I got this several times a day now on Firefox 46 on Linux. It seldom happened before.
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).
I experience this annoyance many times a day. It is terrible. I'm near to getting-rid of FF for this reason.