As seen in many webkit based browsers (ipad browser safari, android browser, chrome) zoom to content is a good feature for small devices with touch support.
Just for reference, in the browsers that already support this feature the usage is as follows: double-tap zooms to content, double-tap in zoomed content zooms out.
This is implemented already in webkit-core , so it needs to be added in the API of webkit-gtk. It has been implemented for the QT API .
Upstream feature request for the Browser used in the Sugar learning platform .