diff --git a/src/webpage/localuser.ts b/src/webpage/localuser.ts
index ba6ae3f..03609c8 100644
--- a/src/webpage/localuser.ts
+++ b/src/webpage/localuser.ts
@@ -3235,6 +3235,18 @@ class Localuser {
 					localStorage.removeItem("traces");
 				}
 			};
+			const box4 = devSettings.addCheckboxInput(I18n.devSettings.cache(), () => {}, {
+				initState: !!localStorage.getItem("isDev"),
+			});
+			box4.onchange = (e) => {
+				if (e) {
+					localStorage.setItem("isDev", "true");
+				} else {
+					localStorage.removeItem("isDev");
+				}
+				SW.postMessage({code: "isDev", dev: e});
+			};
+			devSettings.addText(I18n.devSettings.cacheDesc());
 		}
 		if (this.trace.length && localStorage.getItem("traces")) {
 			const traces = settings.addButton(I18n.localuser.trace());
diff --git a/src/webpage/utils/utils.ts b/src/webpage/utils/utils.ts
index 509e2ee..52659f6 100644
--- a/src/webpage/utils/utils.ts
+++ b/src/webpage/utils/utils.ts
@@ -856,6 +856,7 @@ export class SW {
 			port.port1.close();
 		});
 		this.postMessage({code: "ping"});
+		this.postMessage({code: "isDev", dev: !!localStorage.getItem("isDev")});
 		this.captureEvent("updates", (update, stop) => {
 			this.needsUpdate ||= update.updates;
 			if (update) {
diff --git a/translations/en.json b/translations/en.json
index f4483fe..c489e17 100644
--- a/translations/en.json
+++ b/translations/en.json
@@ -295,7 +295,9 @@
 		"description":"These are for developers of Spacebar/Fermi, if you don't know what you're doing, please don't mess with these settings.",
 		"badUser":"Enabled logging of bad user objects that send too much information:",
 		"logGateway":"Log received gateway events (log level info):",
-		"traces":"Expose traces:"
+		"traces":"Expose traces:",
+		"cache":"Enable Service Worker Caching map files:",
+		"cacheDesc":"map files will still load either way, this'll just make sure they're in cache when a new update rolls out."
 	},
 	"htmlPages": {
 		"idpermissions": "This will allow the bot to:",