I just tried the new feature AJAX requests in the web debug toolbar by replacing "symfony/symfony": "~2.5" with "symfony/symfony": "2.6.*@dev" (don't know if there is a better solution for doing it) and I saw something weird :

I would have your opinion before doing a PR for solving this problem.

The default configuration for the option excluded_ajax_paths is ^/bundles|^/_wdt.
But the web debug toolbar is visible only in dev and the urls are app_dev.php/....
So, I thought of 2 solutions:

1. update the standard edition app/config/config_dev.yml file by adding in the web_profiler : excluded_ajax_paths: "^/app_dev.php/bundles|^/app_dev.php/_wdt"
2. add the environment in the default value of excluded_ajax_paths

What do you think ?
Is there a better solution ? Or the problem is just because I didn't use it the right way.