diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
index fc2543c1c4dd..db52a486c142 100644
--- a/modules/libpref/init/StaticPrefList.yaml
+++ b/modules/libpref/init/StaticPrefList.yaml
@@ -9905,7 +9905,7 @@
 # this pref should be removed at some point in the future.
 - name: network.cache.bug1708673
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 #  This is used for a temporary workaround for a web-compat issue. If pref is
diff --git a/netwerk/test/unit/test_cache2-02b-open-non-existing-and-doom.js b/netwerk/test/unit/test_cache2-02b-open-non-existing-and-doom.js
index 7e467413b0b2..50e72ac92ee8 100644
--- a/netwerk/test/unit/test_cache2-02b-open-non-existing-and-doom.js
+++ b/netwerk/test/unit/test_cache2-02b-open-non-existing-and-doom.js
@@ -56,11 +56,6 @@ add_task(async function test() {
     );
   });
 
-  Services.prefs.setBoolPref("network.cache.bug1708673", true);
-  registerCleanupFunction(() => {
-    Services.prefs.clearUserPref("network.cache.bug1708673");
-  });
-
   let asyncDoomVisitor = new Promise(resolve => {
     let doomTasks = [];
     let visitor = {