Rated 4 out of 5 stars

It is a good extension, but it try to force use Tahoma font in quote header, if it is not desired it's necessary to manually change the font each time to send an e-mail.

It also force to use a line bar in quote header, I couldn't find a way to remove the line. In my case this line bar split my e-mail from my signature that is automatically placed by mail server before quote header.
If wasn't for it, it could be a good replacement for 'ReplyWithHeader' that still does not support Thunderbird 115.1.1

Edit: About line bar, thanks, it worked fine.

About the font, actually at least in Outlook Web, as well as in e-mails I receive, it is Calibri.
Tahoma displays as monospaced to me, I know I can just install Windows fonts, but I'm not confident wether all my contacts have this font. It should be Calibri that is currently used by Outlook, or let me to choose.

This review is for a previous version of the add-on (2.4). 

I think the reason one uses a quote header in Outlook style is to make it look consistent when exchanging messages with those who are using Ms Outlook. From my experience, message replies I received from those users always use Tahoma. So this is intentional and I do not plan to change it.

To remove the message boundary line, you only need this recipe: from the quote header options dialog set the delimiter to "||html". Be advised, the double quotes are not part of the recipe.