Restored bookmarks all get moved to default bookmark folder

[Alex-Brian-Carol-Deji]

This is a Bug Report

Description

I used Firefox's restore bookmarks function and this add-on moved all of the restored bookmarks to the default bookmark folder.

Steps to reproduce the problem

1. backup your bookmarks
2. delete your bookmarks
3. restore your bookmarks
4. Deactivate this add-on and repeat the above steps to compare the results.

Expected behavior

Bookmarks are where they are supposed to be according to the backup file.

Specifications

• Version of the add-on: 3.1.0

• Firefox edition: Firefox (regular edition)
• Firefox version: 89.0
• Firefox language: German
• Platform/OS: Windows 10, 64 Bit
• Platform/OS version: 21H1

Additional context

I could literally see the bookmarks disappearing from the toolbar one by one after FF placed them correctly.

Of course this problem can easily be worked around by deactivating the add-on on restore, but it would save a lot of confusion if the add-on could just simply ignore bookmarks being added by the restore function.