Downloaded Tcl Plugin V3 from here <ftp://ftp.tcl.tk/pub/tcl/plugin/tclplugin31-win32-ix86.xpi>. Installation of Tcl Plugin failed with the the following error message:
Firefox could not install the file at
ftp://ftp.tcl.tk/pub/tcl/plugin/tclplugin31-win32-ix86.xpi
because: Install script not found
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Platform is Windows Vista Home Basic (Windows Version 6.0 Build 6001: Service Pack 1)
Platform is Windows Vista Home Basic (Windows Version 6.0 Build 6001: Service Pack 1)