You can do equivalent configuration with the extension settings but I can see how not having imap/nmap could be annoying. However, macros work just fine. I use

You can do equivalent configuration with the extension settings but I can see how not having imap/nmap could be annoying. However, macros work just fine. I use them all the time. Press q and then another letter to start recording a macro for that register. Press q again to stop recording. Then you can type @<letter> to replay the macro