diff --git a/src/app/hooks/useGlean.ts b/src/app/hooks/useGlean.ts
index 490e84370e9..1897997ffe9 100644
--- a/src/app/hooks/useGlean.ts
+++ b/src/app/hooks/useGlean.ts
@@ -13,7 +13,7 @@ import { useExperiments } from "../../contextProviders/experiments";
 
 export const useGlean = () => {
   const session = useSession();
-  const experimentData = useExperiments();
+  const experiments = useExperiments();
   // Telemetry recording is mocked in our unit tests, therefore we
   // do not have test coverage for this method.
   /* c8 ignore start */
@@ -44,38 +44,19 @@ export const useGlean = () => {
       // Record the `nimbus_*` keys on all events.
       // `nimbus_*` is set on every metric, but it's too much work for TypeScript
       // to infer that — hence the type assertion.
-      if (
-        experimentData &&
-        typeof experimentData["Enrollments"] !== "undefined"
-      ) {
-        (data as GleanMetricMap["button"]["click"]).nimbus_user_ids =
-          experimentData["Enrollments"].map(
-            (enrollment) => enrollment.nimbus_user_id,
-          );
-        (data as GleanMetricMap["button"]["click"]).nimbus_app_ids =
-          experimentData["Enrollments"].map((enrollment) => enrollment.app_id);
-        (data as GleanMetricMap["button"]["click"]).nimbus_experiments =
-          experimentData["Enrollments"].map(
-            (enrollment) => enrollment.experiment,
-          );
-        (data as GleanMetricMap["button"]["click"]).nimbus_branches =
-          experimentData["Enrollments"].map((enrollment) => enrollment.branch);
-        (data as GleanMetricMap["button"]["click"]).nimbus_experiment_types =
-          experimentData["Enrollments"].map(
-            (enrollment) => enrollment.experiment_type,
-          );
-        (data as GleanMetricMap["button"]["click"]).nimbus_are_previews =
-          experimentData["Enrollments"].map(
-            (enrollment) => enrollment.is_preview,
-          );
+      if (experiments === null) {
+        console.warn(
+          "`useGlean` is used in a component that is not a (grand)child of <ExperimentsProvider>",
+        );
       } else {
-        console.warn("No experiment data available for Glean");
+        (data as GleanMetricMap["button"]["click"]).nimbus_user_id =
+          experiments.experimentationId;
       }
 
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       mod[event].record(data as any);
     },
-    [isPremiumUser, experimentData],
+    [isPremiumUser, experiments],
   );
   /* c8 ignore end */
 
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 71c7260cb56..372d9f153b7 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -91,7 +91,10 @@ export default async function RootLayout({
         data-ga4-measurement-id={CONST_GA4_MEASUREMENT_ID}
         data-node-env={process.env.NODE_ENV}
       >
-        <ExperimentsProvider experimentData={experimentData}>
+        <ExperimentsProvider
+          experimentData={experimentData}
+          experimentationId={experimentationId}
+        >
           <SessionProvider session={session}>{children}</SessionProvider>
         </ExperimentsProvider>
       </body>
diff --git a/src/contextProviders/experiments.test.tsx b/src/contextProviders/experiments.test.tsx
index d26fe044f3a..bd029d114b2 100644
--- a/src/contextProviders/experiments.test.tsx
+++ b/src/contextProviders/experiments.test.tsx
@@ -14,7 +14,10 @@ describe("Experiment context provider", () => {
       return <div />;
     };
     const { container } = render(
-      <ExperimentsProvider experimentData={defaultExperimentData}>
+      <ExperimentsProvider
+        experimentData={defaultExperimentData}
+        experimentationId="-1"
+      >
         <TestComponent />
       </ExperimentsProvider>,
     );
diff --git a/src/contextProviders/experiments.tsx b/src/contextProviders/experiments.tsx
index 875dd555c17..ae11b8008bc 100644
--- a/src/contextProviders/experiments.tsx
+++ b/src/contextProviders/experiments.tsx
@@ -10,18 +10,23 @@ import { ExperimentData_V2_Or_V2LikeV1 } from "../app/functions/server/getExperi
 interface ExperimentsProviderProps {
   children: ReactNode;
   experimentData: ExperimentData_V2_Or_V2LikeV1;
+  experimentationId: string;
 }
 
-export const ExperimentsContext =
-  createContext<ExperimentData_V2_Or_V2LikeV1 | null>(null);
+export const ExperimentsContext = createContext<{
+  experimentData: ExperimentData_V2_Or_V2LikeV1;
+  experimentationId: string;
+} | null>(null);
 
-export const ExperimentsProvider = ({
-  children,
-  experimentData,
-}: ExperimentsProviderProps) => {
+export const ExperimentsProvider = (props: ExperimentsProviderProps) => {
   return (
-    <ExperimentsContext.Provider value={experimentData}>
-      {children}
+    <ExperimentsContext.Provider
+      value={{
+        experimentData: props.experimentData,
+        experimentationId: props.experimentationId,
+      }}
+    >
+      {props.children}
     </ExperimentsContext.Provider>
   );
 };
diff --git a/src/telemetry/metrics.yaml b/src/telemetry/metrics.yaml
index 4a1d2041a91..d6d709d3cc1 100644
--- a/src/telemetry/metrics.yaml
+++ b/src/telemetry/metrics.yaml
@@ -56,36 +56,9 @@ page:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 dashboard:
   view:
@@ -132,36 +105,9 @@ dashboard:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 popup:
   view:
@@ -195,36 +141,9 @@ popup:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
   exit:
     type: event
@@ -257,36 +176,9 @@ popup:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 banner:
   view:
@@ -320,36 +212,9 @@ banner:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 button:
   click:
@@ -383,36 +248,9 @@ button:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 field:
   focus:
@@ -446,36 +284,9 @@ field:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 link:
   click:
@@ -509,36 +320,9 @@ link:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 upgrade_intent:
   click:
@@ -572,36 +356,9 @@ upgrade_intent:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
   success:
     type: event
@@ -632,36 +389,9 @@ upgrade_intent:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 expand:
   click:
@@ -695,36 +425,9 @@ expand:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 collapse:
   click:
@@ -758,36 +461,9 @@ collapse:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 cta_button:
   click:
@@ -821,36 +497,9 @@ cta_button:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
   view:
     type: event
@@ -883,36 +532,9 @@ cta_button:
       plan_tier:
         description: Which tier of plan the user is on [Free, Plus]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
 csat_survey:
   view:
@@ -946,36 +568,9 @@ csat_survey:
       automated_removal_period:
         description: The time period since the first automated removal for the user. [initial, 3-months, 6-months, 12-months]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
   dismiss:
     type: event
@@ -1008,36 +603,9 @@ csat_survey:
       automated_removal_period:
         description: The time period since the first automated removal for the user. [initial, 3-months, 6-months, 12-months]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string
 
   click:
     type: event
@@ -1073,33 +641,6 @@ csat_survey:
       automated_removal_period:
         description: The time period since the first automated removal for the user. [initial, 3-months, 6-months, 12-months]
         type: string
-      nimbus_user_ids:
+      nimbus_user_id:
         description: Nimbus user ID
-        type: array
-        items:
-          type: string
-      nimbus_app_ids:
-        description: Nimbus application ID
-        type: array
-        items:
-          type: string
-      nimbus_experiments:
-        description: Nimbus experiment name
-        type: array
-        items:
-          type: string
-      nimbus_branches:
-        description: Nimbus branch
-        type: array
-        items:
-          type: string
-      nimbus_experiment_types:
-        description: Nimbus experiment type
-        type: array
-        items:
-          type: string
-      nimbus_are_previews:
-        description: Nimbus preview mode enabled
-        type: array
-        items:
-          type: boolean
+        type: string