diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cad8d60..311c67d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,7 +23,7 @@ Also want to check the development status, check the [commit history](https://gi
 * [#266](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/266) Add `setHiddenBreakpoints` attribute in launch.json
 * [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.pinnedFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
 * [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.firstFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
-* [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.rightmostFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
+* [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.lastFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
 * [#286](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/286) Support autocomplete in Debug Console and Conditional Breakpoint
 
 ### Changed
diff --git a/README.md b/README.md
index 45b7a149..727c6e71 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ This extension is a debugger adapter for [VSCode](https://code.visualstudio.com/
     * Added: [#266](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/266) Add `setHiddenBreakpoints` attribute in launch.json
     * Added: [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.pinnedFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
     * Added: [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.firstFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
-    * Added: [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.rightmostFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
+    * Added: [#271](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/271) Add `vscode-autohotkey-debug.variables.lastFile` [command variable](https://code.visualstudio.com/docs/editor/variables-reference#_command-variables)
     * Added: [#286](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/286) Support autocomplete in Debug Console and Conditional Breakpoint
     * Changed: [#60](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/60) Change to suppress error dialogs if runtime supports them
     * Changed: [#116](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/116) Enhanced conditional breakpoint
diff --git a/demo/.vscode/launch.json b/demo/.vscode/launch.json
index 8fdfde3e..728e7d56 100644
--- a/demo/.vscode/launch.json
+++ b/demo/.vscode/launch.json
@@ -45,11 +45,11 @@
             "extends": "AutoHotkey Debug"
         },
         {
-            "name": "rightmostFile Test",
+            "name": "lastFile Test",
             "type": "autohotkey",
             "request": "launch",
-            "program": "${command:vscode-autohotkey-debug.variables.rightmostFile}",
-            "openFileOnExit": "${command:vscode-autohotkey-debug.variables.rightmostFile}",
+            "program": "${command:vscode-autohotkey-debug.variables.lastFile}",
+            "openFileOnExit": "${command:vscode-autohotkey-debug.variables.lastFile}",
             "extends": "AutoHotkey Debug"
         },
         {
diff --git a/package.json b/package.json
index b2818a8b..fa3be45b 100644
--- a/package.json
+++ b/package.json
@@ -99,7 +99,7 @@
         "title": "Returns the path of the first file found in the first tab group"
       },
       {
-        "command": "vscode-autohotkey-debug.variables.rightmostFile",
+        "command": "vscode-autohotkey-debug.variables.lastFile",
         "title": "Returns the path of the last file found in the last tab group"
       },
       {
@@ -150,7 +150,7 @@
           "when": "false"
         },
         {
-          "command": "vscode-autohotkey-debug.variables.rightmostFile",
+          "command": "vscode-autohotkey-debug.variables.lastFile",
           "when": "false"
         },
         {
diff --git a/src/commands.ts b/src/commands.ts
index fe63c008..c598101e 100644
--- a/src/commands.ts
+++ b/src/commands.ts
@@ -133,7 +133,7 @@ export const registerCommands = (context: vscode.ExtensionContext): void => {
     }
     throw Error('`vscode-autohotkey-debug.variables.firstFile` can be used with vscode v1.67.0 or higher.');
   }));
-  context.subscriptions.push(vscode.commands.registerCommand('vscode-autohotkey-debug.variables.rightmostFile', (): string => {
+  context.subscriptions.push(vscode.commands.registerCommand('vscode-autohotkey-debug.variables.lastFile', (): string => {
     if (semver.gte(vscode.version, '1.67.0')) {
       // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-member-access
       const tabGroups: any = (vscode.window as any).tabGroups;
@@ -148,15 +148,15 @@ export const registerCommands = (context: vscode.ExtensionContext): void => {
         throw Error('File not found.');
       }
       // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-member-access
-      const firstTab = tab.tabs[tab.tabs.length - 1];
+      const lasttTab = tab.tabs[tab.tabs.length - 1];
       // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-      if (firstTab.input?.uri) {
+      if (lasttTab.input?.uri) {
         // eslint-disable-next-line @typescript-eslint/no-unsafe-argument, @typescript-eslint/no-unsafe-member-access
-        return URI.parse(firstTab.input.uri).fsPath;
+        return URI.parse(lasttTab.input.uri).fsPath;
       }
       throw Error('File not found.');
     }
-    throw Error('`vscode-autohotkey-debug.variables.rightmostFile` can be used with vscode v1.67.0 or higher.');
+    throw Error('`vscode-autohotkey-debug.variables.lastFile` can be used with vscode v1.67.0 or higher.');
   }));
   context.subscriptions.push(vscode.commands.registerCommand('vscode-autohotkey-debug.commands.runToEndOfFunction', (): void => {
     enableRunToEndOfFunction = true;