@martijnbraam AFAIK it's not that easy. You can't just keep a backend sitting there when you add new features and restructure things - it's a constant source of work. Firefox dropped the GL 2.x renderer years ago for good reasons.
For the specific case of Megapixels I suppose switching to QT might be the best option indeed, assuming there are enough users in the embedded space to ensure GLES 2.0 stays supported for another couple of years :/