It seems like WebKit version in latest OW Sp version is not one of the latest. If I get nightly versions of WebKit, I can use Inspector to change CSS styles of pages (=for web development). But Inspector in OW SP does not let to change CSS.

I hope very much that OW developers update webkit version before releasing 5.7. It is very inconvinient to pen WebKit nightly only to debug something...

[Forrest]

For the most part they cherry pick changes to implement.