I have Terra on my iPad2, and every now and again, it asks if I want to make Terra my default browser. Haven't said yes yet, as I'm still testing it out, but I'm darn close, as I can't seem to find any issues with it (fast, multiple tabs, incognito mode, etc). But since it asks, I assume there is a way to do it (and no, I'm not jail broken). I'm just worried if I let Terra set itself as my default browser, I might not be able to change it back if I change my mind.