Infinite spinner on Connect for Firefox users with Total Cookie Protection

[sime]

Describe the bug
Using MyEtherWallet on Firefox with Total Cookie Protection results in a continuous loading on connect.trezor.io.

Info:

• Browser: Firefox 101.0.1
• OS: OSX 12.2.1
• Bridge: 2.0.31
• Firmware Version: TT, 2.5.1

How to reproduce
Setup Firefox Total Cookie Protection. Settings > Privacy and Security

1. Go to https://www.myetherwallet.com/wallet/access/hardware?type=overview
2. Click Trezor
3. Note the loading spinner

Screenshots
Make exemption for particular problem site:

Console error

Partitioned cookie or storage access was provided to “https://connect.trezor.io/8/iframe.html?version=8.2.8&manifest=IntcImVtYWlsXCI6XCJkZXZAbXlldGhlcndhbGxldC5jb21cIixcImFwcFVybFwiOlwiaHR0cHM6Ly93d3cubXlldGhlcndhbGxldC5jb21cIn0i” because it is loaded in the third-party context and dynamic state partitioning is enabled.

Additional context
The feature is only available to 'easy access' users and is opt in: https://support.mozilla.org/en-US/kb/total-cookie-protection#w_how-do-i-know-if-i-have-early-access

Connect v6 wallet does behave like v8 and thus works in Firefox. Example wallet: https://wallet.xinfin.network/#/access-my-wallet

Suggestion from @mroz22 is to not auto-close the popup in case of error and print it. Though in this case, the popup does not close.

[wendys-cats]

related to this issue.

[bosomt]

QA OK

enabled tracking protection for both sites and it works as expected in Firefox

https://adalite.io
https://connect.trezor.io/9/popup.html#