Incorrect tab after updating to Nightly version v137.0a1

[denian71]

Describe the bug

After updating to Nightly v137.0a1, the tab returns to the default floating tab of Proton.
I'm on the latest version of Lepton (v8.6.6).

Expected behavior

No response

Screenshots

No response

OS

Windows 10

OS - Others

No response

Firefox Version

Firefox Nightly v137.0a1

Distribution

• Original Lepton
• Lepton's photon style
• Lepton's proton style

Theme

• Light
• Dark
• Alpenglow (System: Light)
• Alpenglow (System: Dark)
• System Default
• Others: (e.g. Photon Colors, Google Chrome Dark, Fairytale Of Nature)

Theme - More Info

No response

user.js setup

user.js setup

// Your settings

Additional context

No response

[dorkbuttt]

Seems like 137 as a whole has changed enough to destroy the stylesheets.