Launch Webapps in custom browser

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http://askubuntu.com – I'm using Google Chrome as default web-browser because i need Flash ang i've installed Firefox back to use with Webapps, because Chromium, that i tried to use before, launched through script, taking Pepper Flash from Chrome, isn't working correctly: Webapps are crashing, clicking on their icons in Launcher or in Messaging menu does nothing and by clicking on web-links from the other applications, opens new clean Chromium window. I've tried to fix it, and got only half-result as i'm telling here, so Chromium was purged, Google Chrome became default browser again and Firefox was installed for W (HowTos)