I dunno, clearly not.
I keep trying to use it. vs chrome:
1 - bad at returning memory to the OS; do they expect you to regularly restart the whole browser?
2 - shit at managing cpu usage: I'll regularly find the browser sitting at 20-100% cpu load doing nothing. Chrome handles this like a champ;
3 - it recently lost some bookmarks so hard I had to pull them from backup.
They clearly are not capable of splitting their focus.