Mini cart not refreshing on Firefox 143

[kevinalld]

Issue Type

• Bug report
• Feature request
• Question/Support
• Documentation improvement

Environment Details

Magento Version: 2.4.8-p1
Hyva Theme Version: (Satoshi)
Satoshi Theme Version: (latest)
PHP Version: 8.4
Browser(s): Firefox 143.0.0 (issue only occurs here), Firefox 142.0.0 (works), Chrome, Edge, Safari (works)

Bug Report

Expected Behavior

Mini cart should automatically refresh and show the updated items/quantities after adding or updating a product in the cart.

Actual Behavior

Mini cart stays outdated until manual page refresh.
The network request to /customer/section/load/?sections=cart is never triggered.

Steps to Reproduce

1. Open the shop in Firefox 143.0.0.
2. Add a product to the cart.
3. Observe that the mini cart does not update.

Screenshots/Error Messages

No console errors, but the request to /customer/section/load/?sections=cart does not appear in the network tab.

Additional Context

• Only occurs on Firefox 143.0.0.
• Previous Firefox version (142.0.0) works correctly.
• Bug is also reproducible on your demo site.