Rated 4 out of 5 stars
It possible to use the extension with PHPStorm. Workarounds for bugs are:
1. In PHPStorm set the ide debug key = netbeans-xdebug, because buggy extension form won't allow changing it.
2. Extension switch icon is confusing a bit - to turn on the debugging one should turn off the debugging (set the green bug icon with small red stop sign) and reload the page and if 'listen PHP Debug connections' is on at IDE side the debug process will start.
Riddle solved, thanks for the plugin.