Web Console doesn't try to be a terminal emulator.
When we started out with Web Console, we didn't wanted to use a full-blown terminal emulator on the web, but rather simulate the experience. However, some of the ideas we had about the project turn out to be hard or impossible with that approach.
As of v0.3.0, Web Console comes with a full featured VT100 compatible terminal emulator. This makes any adapter obsolete, as we can easily run any terminal process. Running your pager or favorite terminal editor in Pry is no longer a hassle.