diff --git a/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/index.md b/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/index.md
index 285dbca2ea4712a..7d8c7cd77bb3dbe 100644
--- a/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/index.md
+++ b/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/index.md
@@ -17,6 +17,8 @@ To create an `ExtensionSidebarPane`, call the [`browser.devtools.panels.elements
 
 - [`devtools.panels.ExtensionSidebarPane.setExpression()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setExpression)
   - : Evaluate a JavaScript expression in the web page that the inspector is inspecting. The result is displayed in the sidebar pane.
+- [`devtools.panels.ExtensionSidebarPane.setHeight()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setHeight)
+  - : Sets the height of the sidebar.
 - [`devtools.panels.ExtensionSidebarPane.setObject()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setObject)
   - : Sets a JSON object that will be displayed in the sidebar pane.
 - [`devtools.panels.ExtensionSidebarPane.setPage()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setPage)
diff --git a/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/setheight/index.md b/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/setheight/index.md
new file mode 100644
index 000000000000000..e266bae79cf2d71
--- /dev/null
+++ b/files/en-us/mozilla/add-ons/webextensions/api/devtools/panels/extensionsidebarpane/setheight/index.md
@@ -0,0 +1,78 @@
+---
+title: devtools.panels.ExtensionSidebarPane.setHeight()
+slug: Mozilla/Add-ons/WebExtensions/API/devtools/panels/ExtensionSidebarPane/setHeight
+page-type: webextension-api-function
+browser-compat: webextensions.api.devtools.panels.ExtensionSidebarPane.setHeight
+---
+
+{{AddonSidebar}}
+
+Sets the height of the sidebar.
+
+This is an asynchronous function that returns a [`Promise`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).
+
+## Syntax
+
+```js-nolint
+let setting = browser.devtools.panels.setHeight(
+  height,       // string
+)
+```
+
+### Parameters
+
+- `height`
+  - : `String` A CSS-like size specification, such as '100px' or '12ex'.
+
+### Return value
+
+A [`Promise`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) that is fulfilled with no arguments when the height has been set.
+
+## Examples
+
+Create a new pane, populate it with an HTML page, and set the pane's height. You could run this code in a script loaded by your extension's [devtools page](/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/devtools_page).
+
+```js
+function onCreated(sidebarPane) {
+  sidebarPane.setPage("sidebar/sidebar.html");
+  sidebarPane.setHeight("100px");
+}
+```
+
+{{WebExtExamples}}
+
+## Browser compatibility
+
+{{Compat}}
+
+> **Note:** This API is based on Chromium's [`chrome.devtools.panels`](https://developer.chrome.com/docs/extensions/reference/devtools_panels/) API.
+
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