Dragging multiple tabs to a new window caused all but one to irrecoverably disappear

[joshgold22]

Short description

I selected a large number of tabs (scattered throughout a window with many more) and dragged from one of one of them intending to pull off to the side to a new window. It did create a new window, but only with the single tab I dragged from. Most criically: it closed all of the selected tabs on the original window.

I used this to select all of the "important" tabs on a window that had gotten too full. I meant to drag them to a window, copy urls of the less important ones just for the record and close those. Instead I lost all of the important in-progress work.

Steps to reproduce

I cannot reproduce this! But I wonder if it may relate to the trickiness with dragging. Often when I multi-select and then drag, if I don't get the timing right I end up losing the selection (which may have taken a long time to put together when there were many tabs to sort through.)

Still if that were the only problem, then I would be lose all my effort at selecting (frustrating but not so critical), but I should not lose the tabs: they would just be left behind in the old window to go through and select again.

When I try to replicate with smaller number of tabs, I either lose my selection (only the tab I try to drag is selected) or other times it works as expected.

I have both TST and Multiple Tab Handler enabled.

Expected result

1. Drag tabs to a new window.
2. Impossible to accidentally reset selection by dragging (I think It's fine to reset selection by clicking, but never if the mouse is dragged before releasing the click)

Actual result

Sometimes lost tabs and a new window with only one tab
Sometimes reset selection.
Sometimes correct behavior.

Environment

• Platform (OS): OSX 10.12.6
• Version of Firefox: 60.0.2
• Version (or revision) of Multiple Tab Handler: 2.0.13

Additional notes:

• If the dragging "ghost" showed whether it contains multiples, that would allow me to abort the drag when I see it is a single tab being dragged. (Ideally it could even include a count.)
• Aborting a drag sometimes does not seem to work: I drag back to where it was (mouse back over the tab-bar of the old window) and I still get a new window. Not all the time, though.

[joshgold22]

None of the missing tabs are shown under "recently closed tabs". I wonder if they are somehow hidden.

[piroor]

Does this happen on a combination with Tree Style Tab? Or, MTH alone?

[joshgold22]

I use both in combination.

…

On Jul 12, 2018, at 3:35 AM, piroor ***@***.***> wrote: Is this happen on a combination with Tree Style Tab? Or, MTH alone? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[piroor]

Thanks. Then, the main operation to open a new window from dragged tabs is handled by TST instead of MTH. I couldn't reproduce this problem on my environment, so it may be fixed in the latest development build of TST: https://github.com/piroor/treestyletab/blob/master/README.md#development-builds

[joshgold22]

Just updating to note that I haven't seen this again: I've only had it happen the one time that I reported.