--- a/devtools/shared/commands/resource/resource-command.js
+++ b/devtools/shared/commands/resource/resource-command.js
@@ -449,16 +449,17 @@ class ResourceCommand {
    *        A dictionary object with only one of these two attributes:
    *        - targetFront: a Target Front, if the resource is watched from the target process or thread
    *        - watcherFront: a Watcher Front, if the resource is watched from the parent process
    * @param {Array<json/Front>} resources
    *        Depending on the resource Type, it can be an Array composed of either JSON objects or Fronts,
    *        which describes the resource.
    */
   async _onResourceAvailable({ targetFront, watcherFront }, resources) {
+    let includesDocumentEventWillNavigate = false;
     for (let resource of resources) {
       const { resourceType } = resource;
 
       if (watcherFront) {
         targetFront = await this._getTargetForWatcherResource(resource);
       }
 
       // isAlreadyExistingResource indicates that the resources already existed before
@@ -477,21 +478,35 @@ class ResourceCommand {
         resource = ResourceTransformers[resourceType]({
           resource,
           targetCommand: this.targetCommand,
           targetFront,
           watcherFront: this.watcherFront,
         });
       }
 
+      if (
+        resourceType == ResourceCommand.TYPES.DOCUMENT_EVENT &&
+        resource.name == "will-navigate"
+      ) {
+        includesDocumentEventWillNavigate = true;
+      }
+
       this._queueResourceEvent("available", resourceType, resource);
 
       this._cache.push(resource);
     }
-    this._throttledNotifyWatchers();
+    // If we receive the DOCUMENT_EVENT for will-navigate,
+    // flush immediately the resources in order to notify about the navigation sooner than later.
+    // (this is especially useful for tests, even if they should probably avoid depending on this...)
+    if (includesDocumentEventWillNavigate) {
+      this._notifyWatchers();
+    } else {
+      this._throttledNotifyWatchers();
+    }
   }
 
   /**
    * Method called either by:
    * - the backward compatibility code (LegacyListeners)
    * - target actors RDP events
    * Called everytime a resource is updated in the remote target.
    *