diff --git a/src/background.js b/src/background.js
index 92bf623..48a8049 100644
--- a/src/background.js
+++ b/src/background.js
@@ -9,10 +9,6 @@ browser.runtime.onInstalled.addListener(async (details) => {
 	}
 });
 
-browser.runtime.onStartup.addListener(async () => {
-	await browser.storage.local.remove(['calendar', 'spaceApi']);
-});
-
 browser.alarms.onAlarm.addListener((alarm) => {
 	if (alarm.name === 'fetchData') {
 		fetchNewData();
@@ -68,13 +64,13 @@ async function fetchNewData() {
 			/**
 			 * @type {import("../types").Storage}
 			 */
-			const { spaceApi } = await browser.storage.local.get('spaceApi');
+			const { spaceApi } = await browser.storage.session.get('spaceApi');
 			if (spaceApi && spaceApi.state.open !== spaceApiJson.state.open) {
 				await createStatusChangedNotification(spaceApiJson.state.open);
 			}
 		}
 
-		await browser.storage.local.set({
+		await browser.storage.session.set({
 			calendar: calendarJson,
 			spaceApi: spaceApiJson,
 		});
diff --git a/src/manifest.json b/src/manifest.json
index d79639b..65a267f 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -28,7 +28,7 @@
 	"browser_specific_settings": {
 		"gecko": {
 			"id": "{c9a907ad-a047-4cf6-8b5d-95097d31aa5b}",
-			"strict_min_version": "112.0"
+			"strict_min_version": "115.0"
 		}
 	}
 }
diff --git a/src/popup.js b/src/popup.js
index 5c4b58f..5f12b66 100644
--- a/src/popup.js
+++ b/src/popup.js
@@ -57,7 +57,7 @@ async function init() {
 	/**
 	 * @type {import("../types").Storage}
 	 */
-	const { calendar, spaceApi } = await browser.storage.local.get(['calendar', 'spaceApi']);
+	const { calendar, spaceApi } = await browser.storage.session.get(['calendar', 'spaceApi']);
 
 	if (calendar) {
 		updateNextEvent(calendar);