How to hide the tabs on the user account if it is not his account?

My users have permission to view other users' accounts. Only the "View" tab page. This is exactly what I want.

On the user account, by default, there are three tabs:

• View

• Shortcuts

• Edit

If I am user A and I go to my account, I see the tabs. If I'm user A and I go to user B's account, I don't go to his tab (it makes sense).

Now if I create a page view (e.g. bookmarks) with a menu tab, for user accounts. If I'm User A and go to User B's account, I can see the "Bookmarks" tab.

How to hide tabs on user accounts except current user account?

There is no permission to do this.

You can add a RouteSubscriber with a custom access check to accomplish this. Something like:

class RouteSubscriber extends RouteSubscriberBase {

  /**
   * {@inheritdoc}
   */
  protected function alterRoutes(RouteCollection $collection) {
    if ($route = $collection->get('entity.user.canonical')) {
      $route->setRequirement('_profile_access', '\Drupal\mymodule\Access\ProfileAccessCheck::access');
    }

    if ($route = $collection->get('entity.user.edit_form')) {
      $route->setRequirement('_user_edit_access', '\Drupal\mymodule\Access\AccountEditCheck::access');
    }

    if ($route = $collection->get('entity.user.delete_form')) {
      $route->setRequirement('_user_delete_access', '\Drupal\mymodule\Access\AccountDeleteCheck::access');
    }

    // more entries...
  }

}

and so on, and so forth.

In the access classes you can implement custom logic that should dictate visibility.