1884019 - "confirm before closing multiple tabs" should apply to private browsing mode

Status: NEW

(Firefox :: Private Browsing, enhancement)

Description

[ava]

User Agent: Mozilla/5.0 (Windows NT 11.0; Win64; x64; rv:122.0) Gecko/20240101 Firefox/122.0

Steps to reproduce:

1. Enable the "Confirm before closing multiple tabs" option
2. Open a private browsing window
3. Open two tabs in that window
4. Accidentally close the window
5. All the tabs are lost

Actual results:

All the tabs are lost

Expected results:

Firefox should prompt first, as per the "Confirm before closing multiple tabs" setting. This setting is especially important (and possibly ONLY important) in private browsing because private browsing windows are the only type of window where the close operation doesn't have any Undo function.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Tabbed Browser' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Managed to reproduce this issue on:

• Firefox Nightly 125.0a1;
• Firefox 124.0;

Tested and reproduced on:

• macOS 12;
• Windows 10;
• Ubuntu 22;

Setting as NEW so the developing team can have a look.

Comment 3

[Dão Gottwald [:dao]]

This has been the intended behavior for private windows, to make it easier to quickly get rid of a private window when needed, but we may want to reconsider this given the work that has happened in bug 1846495.

There seems to be some broader interest in changing this according to https://connect.mozilla.org/t5/ideas/warn-when-closing-multiple-tabs-in-private-window/idi-p/34865.