You have Chrome, Firefox, and even Safari. What compels you to use Opera over any of those?
I won't even let Chrome on my sytem directly (i.e. outside of a VM), because I'm tired of it downloading updates with some super needy background service, keeping 100s of megabytes around for no good reason, and no way to turn it off. At least Mozilla products ask. For that reason alone Opera and Firefox play in an entirely different league than Chrome or Safari. Fuck features, let me see your heart... Firefox I use and love, it's just not my main browser because only Opera has bookmark management worth calling that.