diff --git a/devtools/client/fronts/root.js b/devtools/client/fronts/root.js
index 875dae5a0465..0edbe8f8c9e0 100644
--- a/devtools/client/fronts/root.js
+++ b/devtools/client/fronts/root.js
@@ -212,21 +212,6 @@ class RootFront extends FrontClassWithSpec(rootSpec) {
     return this.getProcess(0);
   }
 
-  /**
-   * Retrieve the target descriptor for the provided id.
-   *
-   * @return {ProcessDescriptorFront} the process descriptor front for the
-   *         provided id.
-   */
-  async getProcess(id) {
-    const { form, processDescriptor } = await super.getProcess(id);
-    // Backward compatibility: FF74 or older servers will return the
-    // process descriptor as the "form" property of the response.
-    // Once FF75 is merged to release we can always expect `processDescriptor`
-    // to be defined.
-    return processDescriptor || form;
-  }
-
   /**
    * Override default listTabs request in order to return a list of
    * BrowsingContextTargetFronts while updating their selected state.
diff --git a/devtools/server/actors/root.js b/devtools/server/actors/root.js
index 560af318b6a6..8ab3d3e6a979 100644
--- a/devtools/server/actors/root.js
+++ b/devtools/server/actors/root.js
@@ -578,7 +578,7 @@ exports.RootActor = protocol.ActorClassWithSpec(rootSpec, {
       processDescriptor = new ProcessDescriptorActor(this.conn, options);
       this._processDescriptorActorPool.manage(processDescriptor);
     }
-    return { processDescriptor };
+    return processDescriptor;
   },
 
   /**
diff --git a/devtools/shared/specs/root.js b/devtools/shared/specs/root.js
index c7a2ad4913e7..70c500b8e93f 100644
--- a/devtools/shared/specs/root.js
+++ b/devtools/shared/specs/root.js
@@ -20,14 +20,6 @@ types.addDictType("root.listServiceWorkerRegistrations", {
 types.addDictType("root.listRemoteFrames", {
   frames: "array:frameDescriptor",
 });
-// Backward compatibility: FF74 or older servers will return the
-// process descriptor as the "form" property of the response.
-// Once FF75 is merged to release we can always expect `processDescriptor`
-// to be defined.
-types.addDictType("root.getProcess", {
-  form: "nullable:processDescriptor",
-  processDescriptor: "nullable:processDescriptor",
-});
 types.addDictType("root.listTabs", {
   // Backwards compatibility for servers FF74 and before
   // once FF75 is merged into release, we can return tabDescriptors directly.
@@ -108,7 +100,9 @@ const rootSpecPrototype = {
       request: {
         id: Arg(0, "number"),
       },
-      response: RetVal("root.getProcess"),
+      response: {
+        processDescriptor: RetVal("processDescriptor"),
+      },
     },
 
     listRemoteFrames: {