It is technically possible with a "normal" native app to enable links to the devices default browser from webviews and it would be great to see this functionality in Buildfire apps.
For example - when processing payments or member sign ups from within a webview, they could then link to the default browser to comply with app store rules. A great seamless way to implement this would be by using a css class that could be added into the link.
I would have thought this would be a relatively quick development as the functionality is well documented but could mean a huge benefit to those building apps that link to external websites for functionality via webviews.