diff --git a/README.md b/README.md
index 9d05b59..e8556a1 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ A Model Context Protocol (MCP) server implementation for Selenium WebDriver, ena
 
 - Chrome
 - Firefox
-- MS Edge
+- MS Edge (with Internet Explorer mode support)
 
 ## Use with Goose
 
@@ -121,7 +121,7 @@ Launches a browser session.
 **Parameters:**
 - `browser` (required): Browser to launch
   - Type: string
-  - Enum: ["chrome", "firefox"]
+  - Enum: ["chrome", "firefox", "edge"]
 - `options`: Browser configuration options
   - Type: object
   - Properties:
@@ -129,8 +129,12 @@ Launches a browser session.
       - Type: boolean
     - `arguments`: Additional browser arguments
       - Type: array of strings
+    - `ieMode`: Enable Internet Explorer mode for Edge (Edge only)
+      - Type: boolean
 
-**Example:**
+**Examples:**
+
+Chrome browser:
 ```json
 {
   "tool": "start_browser",
@@ -144,6 +148,20 @@ Launches a browser session.
 }
 ```
 
+Edge with Internet Explorer mode (most important feature):
+```json
+{
+  "tool": "start_browser",
+  "parameters": {
+    "browser": "edge",
+    "options": {
+      "ieMode": true,
+      "arguments": ["--disable-web-security"]
+    }
+  }
+}
+```
+
 ### navigate
 Navigates to a URL.
 
diff --git a/package.json b/package.json
index 58e5294..20c1135 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@angiejones/mcp-selenium",
-  "version": "0.1.21",
+  "version": "0.1.22",
   "description": "Selenium WebDriver MCP Server",
   "type": "module",
   "main": "src/lib/server.js",
diff --git a/src/lib/server.js b/src/lib/server.js
index 78d7514..b5d1799 100755
--- a/src/lib/server.js
+++ b/src/lib/server.js
@@ -8,6 +8,7 @@ const { Builder, By, Key, until, Actions } = pkg;
 import { Options as ChromeOptions } from 'selenium-webdriver/chrome.js';
 import { Options as FirefoxOptions } from 'selenium-webdriver/firefox.js';
 import { Options as EdgeOptions } from 'selenium-webdriver/edge.js';
+import { Options as IEOptions } from 'selenium-webdriver/ie.js';
 
 
 // Create an MCP server
@@ -46,7 +47,8 @@ const getLocator = (by, value) => {
 // Common schemas
 const browserOptionsSchema = z.object({
     headless: z.boolean().optional().describe("Run browser in headless mode"),
-    arguments: z.array(z.string()).optional().describe("Additional browser arguments")
+    arguments: z.array(z.string()).optional().describe("Additional browser arguments"),
+    ieMode: z.boolean().optional().describe("Enable Internet Explorer mode for Edge (Edge only)")
 }).optional();
 
 const locatorSchema = {
@@ -83,17 +85,37 @@ server.tool(
                     break;
                 }
                 case 'edge': {
-                    const edgeOptions = new EdgeOptions();
-                    if (options.headless) {
-                        edgeOptions.addArguments('--headless=new');
-                    }
-                    if (options.arguments) {
-                        options.arguments.forEach(arg => edgeOptions.addArguments(arg));
+                    if (options.ieMode) {
+                        // For IE mode, use IE driver with Edge Chromium attachment
+                        const ieOptions = new IEOptions();
+                        ieOptions.setEdgeChromium(true);
+                        // Fix Protected Mode settings error
+                        ieOptions.introduceFlakinessByIgnoringProtectedModeSettings(true);
+                        ieOptions.ignoreZoomSetting(true);
+                        if (process.env.EDGE_PATH) {
+                            ieOptions.setEdgePath(process.env.EDGE_PATH);
+                        }
+                        if (options.arguments) {
+                            options.arguments.forEach(arg => ieOptions.addBrowserCommandSwitches(arg));
+                        }
+                        driver = await builder
+                            .forBrowser('internet explorer')
+                            .setIeOptions(ieOptions)
+                            .build();
+                    } else {
+                        // Regular Edge browser
+                        const edgeOptions = new EdgeOptions();
+                        if (options.headless) {
+                            edgeOptions.addArguments('--headless=new');
+                        }
+                        if (options.arguments) {
+                            options.arguments.forEach(arg => edgeOptions.addArguments(arg));
+                        }
+                        driver = await builder
+                            .forBrowser('edge')
+                            .setEdgeOptions(edgeOptions)
+                            .build();
                     }
-                    driver = await builder
-                        .forBrowser('edge')
-                        .setEdgeOptions(edgeOptions)
-                        .build();
                     break;
                 }
                 case 'firefox': {