Kudos to barvaz Rated 4 out of 5 stars
Kudos to barvaz for the insightful tip on getting DownThemAll to work in SeaMonkey 2.5. I knew about changing the maxVersion value in the install.rdf file but did not know about the META-INF folder. Deleting that folder made all the difference: DTA now works in SeaMonkey on my pc, too.
Great tip; many thanks!