diff --git a/global/index.d.ts b/global/index.d.ts
index 4e4d6ea..fc08744 100644
--- a/global/index.d.ts
+++ b/global/index.d.ts
@@ -1466,6 +1466,10 @@ declare namespace browser.sidebarAction {
   function open(): Promise<void>;
 
   function close(): Promise<void>;
+
+  function toggle(): Promise<void>;
+
+  function isOpen(details: { windowId?: number }): Promise<boolean>;
 }
 
 declare namespace browser.storage {
diff --git a/package.json b/package.json
index 94aca52..af28f2e 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "web-ext-types",
   "author": "Kelsey Zapata <key@kelseasy.org> (https://kelseyz.org)",
-  "version": "3.2.1",
+  "version": "3.3.1",
   "description": "TypeScript type definitions for WebExtensions",
   "keywords": [
     "firefox",