Are you thinking of EXTPROC/LINEMODE? There's outstanding patches to bash, telnet, and ssh to support these, which enables local line-editing that works smarter than just local echo.
Browser's gone from the stock image on the Nexus 4, 7, and 10.
android.webkit.WebView is still the same Android WebKit engine that Browser used (whether it's installed or not); Chrome brings along its own WebKit port.
Not true. Internet Explorer used to work with both NSAPI and ActiveX plugins, until they pulled support for the former.
"""Netscape-style plug-ins are supported in Internet Explorer 5.5 Service Pack 1 (SP1) and earlier, but are not supported in Internet Explorer 5.5 Service Pack 2 (SP2) and Internet Explorer 6."""
-- http://support.microsoft.com/kb/306790