diff --git a/packages/core/src/tools/experimentalFeatures.ts b/packages/core/src/tools/experimentalFeatures.ts
index c0027b81e0..3bc5286f28 100644
--- a/packages/core/src/tools/experimentalFeatures.ts
+++ b/packages/core/src/tools/experimentalFeatures.ts
@@ -16,7 +16,6 @@ export enum ExperimentalFeature {
   RESOURCE_PAGE_STATES = 'resource_page_states',
   PAGE_STATES = 'page_states',
   COLLECT_FLUSH_REASON = 'collect_flush_reason',
-  NO_RESOURCE_DURATION_FROZEN_STATE = 'no_resource_duration_frozen_state',
 }
 
 const enabledExperimentalFeatures: Set<ExperimentalFeature> = new Set()
diff --git a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.spec.ts b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.spec.ts
index 169e0cd1cc..1ec2b64976 100644
--- a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.spec.ts
+++ b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.spec.ts
@@ -132,8 +132,7 @@ describe('resourceCollection', () => {
     expect(rawRumResourceEventEntry._dd.page_states).toEqual(jasmine.objectContaining(mockPageStates))
   })
 
-  it('should not have a duration if a frozen state happens during the request and no performance entry matches when NO_RESOURCE_DURATION_FROZEN_STATE enabled', () => {
-    addExperimentalFeatures([ExperimentalFeature.NO_RESOURCE_DURATION_FROZEN_STATE])
+  it('should not have a duration if a frozen state happens during the request and no performance entry matches', () => {
     const { lifeCycle, rawRumEvents } = setupBuilder.build()
     const mockPageStates = [{ state: PageState.FROZEN, startTime: 0 as RelativeTime }]
     const mockXHR = createCompletedRequest()
@@ -146,19 +145,6 @@ describe('resourceCollection', () => {
     expect(rawRumResourceEventFetch.resource.duration).toBeUndefined()
   })
 
-  it('should have a duration if a frozen state happens during the request and no performance entry matches when NO_RESOURCE_DURATION_FROZEN_STATE disabled', () => {
-    const { lifeCycle, rawRumEvents } = setupBuilder.build()
-    const mockPageStates = [{ state: PageState.FROZEN, startTime: 0 as RelativeTime }]
-    const mockXHR = createCompletedRequest()
-
-    pageStateHistorySpy.and.returnValue(mockPageStates)
-
-    lifeCycle.notify(LifeCycleEventType.REQUEST_COMPLETED, mockXHR)
-
-    const rawRumResourceEventFetch = rawRumEvents[0].rawRumEvent as RawRumResourceEvent
-    expect(rawRumResourceEventFetch.resource.duration).toBeDefined()
-  })
-
   it('should not collect page states on resources when ff resource_page_states disabled', () => {
     const { lifeCycle, rawRumEvents } = setupBuilder.build()
     const mockPageStates = [{ state: PageState.ACTIVE, startTime: 0 as RelativeTime }]
@@ -173,7 +159,6 @@ describe('resourceCollection', () => {
     const rawRumResourceEventFetch = rawRumEvents[0].rawRumEvent as RawRumResourceEvent
     const rawRumResourceEventEntry = rawRumEvents[1].rawRumEvent as RawRumResourceEvent
 
-    expect(pageStateHistorySpy).not.toHaveBeenCalled()
     expect(rawRumResourceEventFetch._dd.page_states).not.toBeDefined()
     expect(rawRumResourceEventEntry._dd.page_states).not.toBeDefined()
   })
diff --git a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.ts b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.ts
index 9ab57ed2a6..4f8d059223 100644
--- a/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.ts
+++ b/packages/rum-core/src/domain/rumEventsCollection/resource/resourceCollection.ts
@@ -231,11 +231,6 @@ function computePageStateInfo(pageStateHistory: PageStateHistory, startClocks: C
 }
 
 function computeRequestDuration(pageStateHistory: PageStateHistory, startClocks: ClocksState, duration: Duration) {
-  // TODO remove FF in next major
-  if (!isExperimentalFeatureEnabled(ExperimentalFeature.NO_RESOURCE_DURATION_FROZEN_STATE)) {
-    return toServerDuration(duration)
-  }
-
   const requestCrossedFrozenState = pageStateHistory
     .findAll(startClocks.relative, duration)
     ?.some((pageState) => pageState.state === PageState.FROZEN)