diff --git a/typo3/sysext/install/Resources/Private/Partials/Action/Step/DatabaseConnect/ConnectDetails.html b/typo3/sysext/install/Resources/Private/Partials/Action/Step/DatabaseConnect/ConnectDetails.html
index f5c44a5d9959b81d004579da240ead1018616c42..417e50c8be30b95b7575a22fb9c9c12014d96a9c 100644
--- a/typo3/sysext/install/Resources/Private/Partials/Action/Step/DatabaseConnect/ConnectDetails.html
+++ b/typo3/sysext/install/Resources/Private/Partials/Action/Step/DatabaseConnect/ConnectDetails.html
@@ -7,14 +7,14 @@
 			<f:if condition="{renderConnectDetailsUsername}">
 				<li>
 					<label for="t3-install-step-username">Username</label>
-					<input id="t3-install-step-username" class="t3-install-form-input-text" type="text" value="{username}" name="install[values][username]" />
+					<input id="t3-install-step-username" class="t3-install-form-input-text" type="text" value="{username}" name="install[values][username]" autocomplete="off" />
 				</li>
 			</f:if>
 
 			<f:if condition="{renderConnectDetailsPassword}">
 				<li>
 					<label for="t3-install-step-password">Password</label>
-					<input id="t3-install-step-password" class="t3-install-form-input-text" type="password" value="{password}" name="install[values][password]" />
+					<input id="t3-install-step-password" class="t3-install-form-input-text" type="password" value="{password}" name="install[values][password]" autocomplete="off" />
 				</li>
 			</f:if>
 
diff --git a/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/CreateAdministrator.html b/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/CreateAdministrator.html
index 90794d43c650e68e0990f116ab4fe74a7c7d31b3..06d679323b722c23b8e83861c863c5f44abaa572 100644
--- a/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/CreateAdministrator.html
+++ b/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/CreateAdministrator.html
@@ -14,6 +14,7 @@
 					class="t3-install-form-input-text"
 					type="text"
 					name="install[values][newUserUsername]"
+					autocomplete="off"
 				/>
 			</li>
 			<li>
@@ -23,6 +24,7 @@
 					class="t3-install-form-input-text t3-install-form-password-strength"
 					type="password"
 					name="install[values][newUserPassword]"
+					autocomplete="off"
 				/>
 			</li>
 			<li>
@@ -32,6 +34,7 @@
 					class="t3-install-form-input-text"
 					type="password"
 					name="install[values][newUserPasswordCheck]"
+					autocomplete="off"
 				/>
 			</li>
 		</ol>
diff --git a/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/NewInstallToolPassword.html b/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/NewInstallToolPassword.html
index 1d2361497ca36ce4cfbe19064e5cdc1bcca9d504..eb9b0e3796e92ae44025d7ee5003d9d19bb25d79 100644
--- a/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/NewInstallToolPassword.html
+++ b/typo3/sysext/install/Resources/Private/Partials/Action/Tool/ImportantActions/NewInstallToolPassword.html
@@ -6,20 +6,22 @@
 			<li>
 				<label for="t3-install-password">Enter new password:</label>
 				<input
-						id="t3-install-password"
-						class="t3-install-form-input-text t3-install-form-password-strength"
-						type="password"
-						name="install[values][newInstallToolPassword]"
-						/>
+					id="t3-install-password"
+					class="t3-install-form-input-text t3-install-form-password-strength"
+					type="password"
+					name="install[values][newInstallToolPassword]"
+					autocomplete="off"
+				/>
 			</li>
 			<li>
 				<label for="t3-install-password-repeat">Repeat password:</label>
 				<input
-						id="t3-install-password-repeat"
-						class="t3-install-form-input-text"
-						type="password"
-						name="install[values][newInstallToolPasswordCheck]"
-						/>
+					id="t3-install-password-repeat"
+					class="t3-install-form-input-text"
+					type="password"
+					name="install[values][newInstallToolPasswordCheck]"
+					autocomplete="off"
+				/>
 			</li>
 		</ol>
 	</fieldset>
diff --git a/typo3/sysext/install/Resources/Private/Templates/Action/Step/DatabaseData.html b/typo3/sysext/install/Resources/Private/Templates/Action/Step/DatabaseData.html
index 21407ff8b13f5444851954d4a6a1daa9b7c02314..308658f561906c6398dc3d539752974ac2fdac8c 100644
--- a/typo3/sysext/install/Resources/Private/Templates/Action/Step/DatabaseData.html
+++ b/typo3/sysext/install/Resources/Private/Templates/Action/Step/DatabaseData.html
@@ -26,6 +26,7 @@
 						name="install[values][username]"
 						id="username"
 						placeholder="admin"
+						autocomplete="off"
 					/>
 				</li>
 
@@ -36,6 +37,7 @@
 						name="install[values][password]"
 						id="password"
 						type="password"
+						autocomplete="off"
 					/>
 				</li>