--- a/toolkit/components/extensions/Extension.jsm
+++ b/toolkit/components/extensions/Extension.jsm
@@ -426,18 +426,18 @@ this.ExtensionData = class {
           this.id = this.manifest.applications.gecko.id;
         }
       } catch (e) {
         // Errors are handled by the type checks above.
       }
 
       let containersEnabled = true;
       try {
-        containerEnabled = Services.prefs.getBoolPref("privacy.userContext.enabled");
-      } catch(e) {
+        containersEnabled = Services.prefs.getBoolPref("privacy.userContext.enabled");
+      } catch (e) {
         // If we fail here, we are in some xpcshell test.
       }
 
       let permissions = this.manifest.permissions || [];
 
       let whitelist = [];
       for (let perm of permissions) {
         if (perm == "contextualIdentities" && !containersEnabled) {