I use Firefox (and occasionally Opera) in Alien Dalvik most of the time, since it's much faster, better UI and better features.

Otherwise mostly WebPirate, and sometimes WebCat.

Almost never SF Browser. It's slower on some websites than WP & WC, but more importantly has a fraction of the features. Also, it STILL can't connect to browser-based wifi login (great job on that Jolla), so if you want to connect to that type of wifi you have to use WebPirate or Webcat.

The last 2 versions of SF I had to stop using Android browsers in AD, as the OOM app killer was so easily triggered. It's still present in the latest Early Access release, but less constant so I've been able to go back to it. This was the main reason I got the Nexus5 (RAM).

P.S. On the Nexus 5 under SF I use WebCat over WebPirate, as the latter doesn't scale properly yet.