1932527 - Open previous windows and tabs not opening all windows

Status: NEW

(Firefox :: Session Restore, defect)

Description

[deadmeu]

Steps to reproduce:

1. Ensure the "Open previous windows and tabs" option is enabled
2. Open 10 windows, each with a couple of tabs open
3. Close all windows at once
4. Open Firefox and some of the previous windows will reopen

Actual results:

Only some of the windows will reopen, not all of them.

Tested in Arch Linux, against Firefox 132 and 131 (both installed via Flatpak).

Expected results:

All of the windows should reopen.

Comment 1

[Negritas Sergiu, Desktop QA]

Hello! I have managed to reproduce the issue with firefox 134.0a1(2024-11-22) and 133.0 on Ubuntu 22.04 and Windows 10 with the STR provided in the description.
I will mark this issue as NEW and set the corresponding flags in order to get our developers involved and provide a solution in further releases.

Have a nice day!

Comment 2

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

The bug has a release status flag that shows some version of Firefox is affected, thus it will be considered confirmed.

Comment 3

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

The severity field is not set for this bug.
:sfoster, could you have a look please?

For more information, please visit BugBot documentation.

Comment 4

[deadmeu]

Can this please be looked at with some priority and marked with an appropriate severity? I have already lost tabs that I have previously kept open for months. Now I have to copy all open tabs in all open windows every time before I close Firefox / shutdown my computer so that I can later restore what I had open. I really don't want to have to keep doing this every single day for the next months/years.