Steps to reproduce:

1. Have several tabs opened on which you have navigated through multiple pages.
2. Either put Firefox in the background for a while or close it and re-open it.

Actual results:

Some or all of your tabs will be on a previous page.
For example: If tab 4 had been used to navigate pages a,b,c,d,e,f; You might find it loading any of those pages instead of systematically loading f.

Expected results:

All tabs should load the last page visited on each of them.

Some more context:
I'm using Firefox nightly on Android (currently v124.0a1 (Build #2016001031))
The bug has been happening for a while (can't remember how long but already happened for at least one month)
Only uBlock is installed as an add-on.
Already tried to uninstall and clear all data and then re-install
Use a synchronized account (don't have the problem on my desktop both private and pro)

I don't have many tabs "OPENED", but I do have a lot of "INACTIVE" tabs if that is considered different.

They are basically the same , they're all saved to mozilla_components_session_storage_gecko.json file.

I tested by deleting a good chunk of my inactive tabs. The state of tabs is now saved properly.

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

For more information, please visit BugBot documentation.

Hello chatelain.cedric.pro, are you still experiencing this issue? I was not able to reproduce it on Nightly 124.0a1 and Beta 124.0b1 with Samsung Galaxy S22 Ultra (Android 14).

Yes, it is. The bug is still present although with less regularity since I deleted a lot of inactive tabs.
I'm on:

• Nightly 125.0a1
• Pixel 5
• Android 13

I've added this ticket for now as a blocker for Bug 1850590 for some additional tracking, as this looks related to issues we've seen regarding losing tab states when saving a lot of tabs.