Rated 5 out of 5 stars

by mnky on Feb. 16, 2012 · permalink

One hard to find and little spoken about feature that I think makes this a great add-on is the "hybrid" signature. This is where you can offer different signatures for HTML or Plain Text in the same file.

Basically it goes::
Plain Text
=
HTML

This is so useful as you can include images and detailed HTML styling and know that plain text readers will still see a nice clean signature.

Unfortunately Thunderbird doesn't support this so if you have the signature switched on by default in the Account Settings you see both versions. My one criticism of this Add-on is that it deals with Plain/HTML Signatures differently to how Thunderbird natively handles them which can be confusing at first. Especially as Thunderbird doesn't make it easy to switch between HTML and Plain Text email formatting. Using both methods without the hybrid signature means you either have no line breaks in one or extra <br>s in the other.

More about Hybrid Signatures here:
http://mozext.achimonline.de/signatureswitch_hybrid_signature.php