I came here just to say that i also want webApps. Opera should at least inform that the site supports webapp installation so we can go to other browser, install it and get back to opera. At least that!!
I enable it in the in the settings, but it still doesn't work. I also do have adobe flash downloaded. Any advice to make it work on Opera GX?
Re: Site panels from Sidebar opens windows wrongly
It suffices to reload the pages opened from Sidebar's Custom Site panels to correct those errors - the right icons will start to represent corresponding pages.