Swipe-up from bottom is launching Opera in android apps
I have first noticed this maybe couple of months ago, but now it has started to irritate me a lot.
The problem happens only in android apps. When I swipe up from the bottom of the screen (doesn't matter if I start exactly from the back-button or elsewhere from the black area), the Opera android app launches. If I press back-button, it goes back to the app I was before. When I do this in the Opera app itself, it just launches a new tab.
I've tried to find the explanation to this, and turned out that AndroidOS has this feature, where it launches Google Now by swiping up. But why on earth I have this feature and is there any way to disable it? I'm aware of SwipeLaunch Disabler, that might do the trick, I haven't tried yet.