diff --git a/.vscode/settings.json b/.vscode/settings.json
index c748d82..ed9cc7b 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,6 +2,7 @@
 	"cSpell.words": [
 		"Blockiermodi",
 		"Blockiermodus",
+		"Captcha",
 		"Ignorierliste",
 		"Maleficient",
 		"Nachfrageverweigerungsmodus",
diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index c592449..990284d 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -865,6 +865,10 @@
 		"message": "Es werden window.opener und window.name beschützt. Dies kann manche Webseiten unbrauchbar machen.",
 		"description": ""
 	},
+	"protectWindow_askReCaptchaException": {
+		"message": "Wenn die Window-API beschützt wird, funktioniert reCAPTCHA nicht mehr. Wollen Sie dafür eine Ausnahme hinzufügen?",
+		"description": ""
+	},
 	
 	"theme_title": {
 		"message": "Theme",
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 716259b..0650127 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -857,13 +857,17 @@
 	},
 	
 	"protectWindow_title": {
-		"message": "Protect Window API",
+		"message": "Protect window API",
 		"description": ""
 	},
 	"protectWindow_description": {
 		"message": "window.opener and window.name will be protected. This can render some web pages unusable.",
 		"description": ""
 	},
+	"protectWindow_askReCaptchaException": {
+		"message": "Protecting the window API breaks reCAPTCHA. Do you want to add an exception for it?",
+		"description": ""
+	},
 	
 	"theme_title": {
 		"message": "Theme",
diff --git a/options/options.js b/options/options.js
index 5707d52..7955bf8 100644
--- a/options/options.js
+++ b/options/options.js
@@ -255,4 +255,25 @@
 		version.textContent = "Version " + manifest.version;
 	});
 	document.body.appendChild(version);
+	
+	settings.onloaded(function(){
+		const reCaptchaEntry = "^https://www\\.google\\.com/recaptcha/api2/(?:b?frame|anchor).*$";
+		const {url: urlContainer} = settings.getContainers();
+		settings.on("protectWindow", function({newValue}){
+			const urlValue = urlContainer.get();
+			const matching = urlValue.filter(function(entry){
+				return entry.url = reCaptchaEntry;
+			});
+			if (
+				newValue &&
+				(
+					matching.length === 0 ||
+					matching[0].protectWindow
+				 ) &&
+				window.confirm(browser.i18n.getMessage("protectWindow_askReCaptchaException"))
+			){
+				settings.set("protectWindow", false, reCaptchaEntry);
+			}
+		});
+	});
 }());