diff --git a/docs/man_pages/project/testing/run-ios.md b/docs/man_pages/project/testing/run-ios.md
index b1ac6bc916..2217439c04 100644
--- a/docs/man_pages/project/testing/run-ios.md
+++ b/docs/man_pages/project/testing/run-ios.md
@@ -45,6 +45,10 @@ Start an emulator with specified device identifier and sdk | `$ tns run ios [--d
     *   `--env.hiddenSourceMap` - creates sources maps in the root folder (useful for Crashlytics usage with bundled app in release).
 * `--force` - If set, skips the application compatibility checks and forces `npm i` to ensure all dependencies are installed. Otherwise, the command will check the application compatibility with the current CLI version and could fail requiring `tns migrate`.
 
+### Environment Variables
+
+* `IOS_SIMULATOR_RUN_ARGS` - specifies extra command line arguments to pass to the application when running on the iOS Simulator. E.g. `$ IOS_SIMULATOR_RUN_ARGS=-FIRDebugEnabled ns device run ios`.
+
 <% } %>
 <% if(isHtml) { %>
 
diff --git a/lib/common/mobile/ios/simulator/ios-simulator-application-manager.ts b/lib/common/mobile/ios/simulator/ios-simulator-application-manager.ts
index 46825e13aa..0c5828fdd3 100644
--- a/lib/common/mobile/ios/simulator/ios-simulator-application-manager.ts
+++ b/lib/common/mobile/ios/simulator/ios-simulator-application-manager.ts
@@ -71,11 +71,14 @@ export class IOSSimulatorApplicationManager extends ApplicationManagerBase {
 	public async startApplication(
 		appData: Mobile.IStartApplicationData
 	): Promise<void> {
+		const args = process.env.IOS_SIMULATOR_RUN_ARGS || "";
 		const options = appData.waitForDebugger
 			? {
 					waitForDebugger: true,
-					args: "--nativescript-debug-brk",
+					args: `--nativescript-debug-brk ${args}`.trim(),
 			  }
+			: args
+			? { args }
 			: {};
 		await this.setDeviceLogData(appData);
 		const launchResult = await this.iosSim.startApplication(