diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index ffb9ef4..c079ec0 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -491,6 +491,14 @@
 		"message": "Leeren",
 		"description": ""
 	},
+	"clearPersistentRndForContainer_label": {
+		"message": "Container leeren",
+		"description": ""
+	},
+	"clearPersistentRndForContainer_title": {
+		"message": "Container auswählen",
+		"description": ""
+	},
 	"sharePersistentRndBetweenDomains_title": {
 		"message": "Persistente Zufallszahlen zwischen Domains teilen",
 		"description": ""
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 6b41820..12bde38 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -515,6 +515,14 @@
 		"message": "Clear",
 		"description": ""
 	},
+	"clearPersistentRndForContainer_label": {
+		"message": "Clear container",
+		"description": ""
+	},
+	"clearPersistentRndForContainer_title": {
+		"message": "Select container",
+		"description": ""
+	},
 	
 	"sharePersistentRndBetweenDomains_title": {
 		"message": "Share persistent randomness between domains",
diff --git a/lib/main.js b/lib/main.js
index a90186a..4ed055c 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -41,6 +41,12 @@
 					return;
 				}
 			}
+			if (data["canvasBlocker-clear-container-rnd"]){
+				persistentRndStorage.clearContainerData(data["canvasBlocker-clear-container-rnd"]);
+				if (keys.length === 1){
+					return;
+				}
+			}
 			notice("pass the message to the tabs");
 			browser.tabs.query({}).then(function(tabs){
 				tabs.forEach(function(tab){
diff --git a/lib/modal.js b/lib/modal.js
index 31584d7..7c5fb6c 100644
--- a/lib/modal.js
+++ b/lib/modal.js
@@ -118,6 +118,8 @@
 			window.addEventListener("scroll", positionDialog);
 			window.addEventListener("resize", positionDialog);
 		}
+		
+		return container;
 	}
 	
 	scope.confirm = function(text, parent){
@@ -128,4 +130,22 @@
 			], parent);
 		});
 	};
+	
+	scope.select = function(text, options, parent){
+		return new Promise(function(resolve, reject){
+			const select = document.createElement("select");
+			options.forEach(function(option){
+				const optionNode = document.createElement("option");
+				optionNode.text = option.name;
+				optionNode.object = option.object;
+				select.appendChild(optionNode);
+			});
+			
+			const container = openDialog(text, [
+				{text: extension.getTranslation("cancel"), default: true, callback: ()=>reject(false)},
+				{text: extension.getTranslation("OK"), focused: true, callback: ()=>resolve(select.options[select.selectedIndex].object)}
+			], parent);
+			container.querySelector(".text").insertAdjacentElement("afterend", select);
+		});
+	};
 }());
\ No newline at end of file
diff --git a/options/options.js b/options/options.js
index 454d91e..bb637d0 100644
--- a/options/options.js
+++ b/options/options.js
@@ -34,6 +34,21 @@
 			logging.notice("send message to main script");
 			extension.message.send({"canvasBlocker-clear-domain-rnd": true});
 		},
+		clearPersistentRndForContainer: function(){
+			browser.contextualIdentities.query({}).then(function(identities){
+				modal.select(
+					extension.getTranslation("clearPersistentRndForContainer_title"),
+					identities.map(function(identity){
+						return {
+							name: `${identity.name} (${identity.cookieStoreId})`,
+							object: identity
+						};
+					})
+				).then(function(identity){
+					extension.message.send({"canvasBlocker-clear-container-rnd": identity.cookieStoreId});
+				}, ()=>{});
+			});
+		},
 		inspectSettings: function(){
 			logging.verbose("open settings inspection");
 			window.open("export.html", "_blank");
diff --git a/options/settingsDisplay.js b/options/settingsDisplay.js
index 93d4b15..73bce9c 100644
--- a/options/settingsDisplay.js
+++ b/options/settingsDisplay.js
@@ -85,6 +85,7 @@
 		},
 		{
 			"name": "clearPersistentRnd",
+			"actions": ["clearPersistentRnd", "clearPersistentRndForContainer"],
 			"displayDependencies": [
 				{
 					"blockMode": ["fake"],
diff --git a/releaseNotes.txt b/releaseNotes.txt
index f760273..a0fa4dc 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -6,6 +6,7 @@ Version 0.5.11:
 		- added auto update for beta versions
 		- options: made sections collapsible
 		- clear persistent rng data if a container is deleted
+		- added tool to clear persistent rng for a specific container
 	
 	fixes:
 		- improved protection of (i)frame properties