Rated 5 out of 5 stars

Simple, and it works. This functionality should be a default part of Thunderbird. Thank you!

Rated 5 out of 5 stars

5 Stars.
I use this in combination with the ChangeQuote extension for more detailed headers in email replies.

When viewing replies in macOS Mail, this extension allows macOS to accurately distinguish between the body of the email and the quoted text. It displays the “See More” button, which properly reveals the quoted content, as expected.

Without this extension, ChangeQuote sometimes causes issues in other email clients, where they can’t correctly separate the email body from the quote. This extension resolves that problem, and I’m very pleased with the end result.