@rattenhirn @leeloo I think any engine would have to match what is out there. There might be some small exceptions, but not much.When it comes down to it, if an engine does not work with the content out there, it does not have much real value and clearly would not be something any normal browser could use.Presto was a much more compact codebase and because it was all written by us, with almost no use of libraries, it could do what the other engines did, but just better. Thus it is possible to build an engine that does it all, but it just takes a lot of effort. After that you still have the compatibility and blocking issues, though.