Sign-in to Firefox Sync broken

Prerequisites

• Can you reproduce the problem in a fresh firefox profile with only ClearURLs?
• Are you running the latest version of ClearURLs?
• Are you have changed settings under about:config?

Description

Sign-in to Firefox Sync broken.

Steps to Reproduce

1. Enable ClearURLs
2. Click on "Sign in to Firefox"
3. Enter sign-in to Firefox

Expected behavior: Sign in window opens to "Connect another device" page and "You have signed in successfully" notification appears in the lower right of display.

Expected URL "https://accounts.firefox.com/connect_another_device?context=fx_desktop_v3&entrypoint=fxa_discoverability_native&action=email&service=sync" (for latest Firefox at least)

Actual behavior: Redirected to account management page with options for changing account settings.

Actual URL "https://accounts.firefox.com/settings?action=email&service=sync"

System

• Version: Firefox version 80.0, Clear URLs version 1.19.0
• Platform: Windows 10 64 bit, Version 1909, Build 18363.778
• Country: US

Log

ClearURLsLogExport.json