Salesforce to Salesforce Sync Status & Record Details plugin works in both Classic and Lightning:
i) Shows Salesforce to Salesforce record Sync Status and corresponding Partner Id of the shared record in the target Org

ii) Shows all Field values for the given record and it's complete Field History

iii) UUID/GUID Converter

It's also available for Chrome: https://chrome.google.com/webstore/detail/salesforce-to-salesforce/amjffmpjihnjbfpnkkdpfkbaiogbeong

Install

• License: GNU General Public License v2.0 or later
• Weekly downloads: 1
• Average daily users: 2
• Rating: 5/5 of 1 ratings
• Created: 2021-05-07 23:45:09
• Last updated: 2021-05-19 04:55:28
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/s2s-lightning/
• API: {0644e174-994b-494d-8ef6-0796c0351ca5}