- Switch to session storage.

change/@azure-msal-browser-4528d6eb-771f-4813-aa74-7303829ecc70.json

@@ -1,6 +1,6 @@
 {
   "type": "patch",
-  "comment": "Allow overriding log level and PII setting with local storage key-values #6704",
+  "comment": "Allow overriding log level and PII setting with session storage key-values #6704",
   "packageName": "@azure/msal-browser",
   "email": "[email protected]",
   "dependentChangeType": "patch"

lib/msal-browser/docs/logging.md

@@ -63,22 +63,20 @@ An example usage in a sample can be accessed [here](https://github.com/AzureAD/m
 
 These are the steps to override MSAL log level and PII settings to troubleshoot errors in non-dev environments:
 
-### Navigate to local storage
+### Navigate to session storage
 
 1. Open developer tools by pressing F12
 2. Navigate to `Application` tab
-3. Click `Storage` and expand `Local Storage`
+3. Click `Storage` and expand `Session Storage`
 4. Select target domain
 
-Additional details can be found [here](https://learn.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium/storage/localstorage).
+Additional details can be found [here](https://learn.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium/storage/sessionstorage).
 
 ### Override log level
 
-Add `msal.browser.log.level` key to `Local Storage`, set it's value to the desired log level (`Verbose`, for example) and refresh the page.
+Add `msal.browser.log.level` key to `Session Storage`, set it's value to the desired log level (`Verbose`, for example) and refresh the page.
 Check `LogLevel` enum for the available options [here](../../msal-common/src/logger/Logger.ts).
 
 ### Override PII log setting
 
-Add `msal.browser.log.pii` key to `Local Storage`, set it's value to `true` or `false` and refresh the page.
-
-**_NOTE:_** Make sure to remove the log keys from `Local Storage` once troubleshooting is done.
+Add `msal.browser.log.pii` key to `Session Storage`, set it's value to `true` or `false` and refresh the page.

lib/msal-browser/src/operatingcontext/BaseOperatingContext.ts

@@ -66,15 +66,16 @@ export abstract class BaseOperatingContext {
         this.browserEnvironment = typeof window !== "undefined";
         this.config = buildConfiguration(config, this.browserEnvironment);
 
-        let localStorage: Storage | undefined;
+        let sessionStorage: Storage | undefined;
         try {
-            localStorage = window[BrowserCacheLocation.LocalStorage];
+            sessionStorage = window[BrowserCacheLocation.SessionStorage];
             // Mute errors if it's a non-browser environment or cookies are blocked.
         } catch (e) {}
 
-        const logLevelKey = localStorage?.getItem(LOG_LEVEL_CACHE_KEY);
+        const logLevelKey = sessionStorage?.getItem(LOG_LEVEL_CACHE_KEY);
         const piiLoggingEnabled =
-            localStorage?.getItem(LOG_PII_CACHE_KEY)?.toLowerCase() === "true";
+            sessionStorage?.getItem(LOG_PII_CACHE_KEY)?.toLowerCase() ===
+            "true";
 
         if (logLevelKey || piiLoggingEnabled) {
             const logLevel =