Rated 5 out of 5 stars

Bugmail 2.0 from https://github.com/fabricedesre/bugmail.git
After updating from SeaMonkey 2.27a1 to 2.31a1 the extension stops working (no more bugmail display when viewing a bugmail from bugzilla.mozilla.org). I'll try Colin Guthrie's version.
Here are my UA strings, build IDs, and CSIDs:
2.27a1: Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0 SeaMonkey/2.27a1 ID:20140214003001 c-c:1ce77c2f9bd0 m-c:d275eebfae04
2.31a1: Mozilla/5.0 (X11; Linux x86_64; rv:34.0) Gecko/20100101 Firefox/34.0 SeaMonkey/2.31a1 ID:20140723133406 c-c:acb745a4d796 m-c:d0f6259e8446

N.B.:
-- AMO gives contrary messages (about 1.6.1): "Works with SeaMonkey 2.0a1and later" and "Not available for SeaMonkey 2.31a1".
-- "Please do not post bug reports in reviews, see the support section"... of which there is none.

This was an excellent add-on… while it worked.

Rated 5 out of 5 stars

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4pre) Gecko/20090906 SeaMonkey/2.0pre - Build ID: 20090906022603

Excellent extension; but for this nightly, use Bugmail 1.5 (not 1.6 or 1.6.1), and override version compatibility checking (there are several ways to do that). I have emailed the author on both counts.

Rated 5 out of 5 stars

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4pre) Gecko/20090906 SeaMonkey/2.0pre - Build ID: 20090906022603

Excellent extension; but for this nightly, use Bugmail 1.5 (not 1.6 or 1.6.1). I have emailed the author.