Implement basic compatibility with SeaMonkey, see #14

content/list.js

@@ -172,6 +172,8 @@ let List = {
 			let appver;
 			if (Services.appinfo.name == "Pale Moon") {
 				appver = "27.9";
+			} else if (Services.appinfo.name == "SeaMonkey") {
+				appver = "52.0";
 			} else {
 				appver = Services.appinfo.version;
 			}