diff --git a/bootstrap.js b/bootstrap.js
index 37175e8..8617cec 100644
--- a/bootstrap.js
+++ b/bootstrap.js
@@ -128,7 +128,12 @@ let menuitem = {
 		}
 		m.style.listStyleImage = 'url("chrome://ca-archive/skin/button.png")';
 
-		let menu = $(doc, "menu_ToolsPopup");
+		let menu;
+		if (Services.appinfo.name == "SeaMonkey") {
+			menu = $(doc, "taskPopup");
+		} else {
+			menu = $(doc, "menu_ToolsPopup");
+		}
 		menu.insertBefore(m, null);
 		return m;
 	}
diff --git a/content/addon.js b/content/addon.js
index e59da4d..f614fb0 100644
--- a/content/addon.js
+++ b/content/addon.js
@@ -92,6 +92,8 @@ let Addon = {
 		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;
 		}
diff --git a/content/list.js b/content/list.js
index d0b4758..5cd8055 100644
--- a/content/list.js
+++ b/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;
 			}
diff --git a/content/versions.js b/content/versions.js
index c1b8422..53e679c 100644
--- a/content/versions.js
+++ b/content/versions.js
@@ -110,6 +110,8 @@ let Versions = {
 			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;
 			}
diff --git a/install.rdf b/install.rdf
index 1751cd4..ee07c12 100644
--- a/install.rdf
+++ b/install.rdf
@@ -25,5 +25,12 @@
 		<em:maxVersion>28.*</em:maxVersion>
 	  </Description>
 	</em:targetApplication>
+	<em:targetApplication>
+	  <Description>
+		<em:id>{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}</em:id>
+		<em:minVersion>2.40</em:minVersion>
+		<em:maxVersion>*</em:maxVersion>
+	  </Description>
+	</em:targetApplication>
   </Description>
 </RDF>