[Intermittent] - Incorrect behavior when closing older tabs

Steps to Reproduce

1. Open Firefox on iOS.
2. Open several tabs in tab tray.
3. Go to device settings and set the date forward with a week and a day and also change the time one hour later.
4. Return to Firefox tab tray and tap on the trashcan.
5. Select close older tabs-->one week ago.

Expected Result All the tabs are closed and the tab tray is empty (except for a homepage tab).

Actual Result One (or sometimes more) of the tabs is NOT closed, so in the tab tray you will see that tab and the homepage tab.

A couple of times we noticed that the oldest tab is the one that doesn’t close, but we don’t have a clear pattern.

Device & Build Information Device: iPhone 17 Pro(iOS 26.0), iPad mini (26.3) Build version: v9000 (67255) First seen:

:information_source: Reference Person

+@Foxbolts+

┆Issue is synchronized with this Jira Bug