Rated 3 out of 5 stars

Really good, but please make these changes (correct bugs):

1) Apply setting from about:config, value " mail.identity.default.suppress_signature_separator" when it is "true". Nowadays your add-on inserts two dashes; it should follow this setting as TB does without your add-on.

2) Apply settings from account settings, section Composition & Addressing, value for "When quoting ... place my signature ... below my reply (above the quote). I.e. when email is reply or forward message, place signature above (or below) the quote according this parameter.

Many thanks beforehand.