Electric WebView is described as 'Scriptable WebView for developers' and is an app. There are 2 alternatives to Electric WebView for Linux and Mac. The best Electric WebView alternative is Surf, which is both free and Open Source.
surf is a simple web browser based on WebKit2/GTK+. It is able to display websites and follow links. It supports the XEmbed protocol which makes it possible to embed it in another application. Furthermore, one can point surf to another URI by setting its XProperties.
Uzbl is a lightweight webkit browser following the UNIX philosophy - to do one thing and do it well.
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