Um, currently Vimium C always clean info about recently-executed keys and commands, so there's no plan to add a command repeating last commands (which may lose efficacy in seconds).

抱歉设计上Vimium C不希望执行不受控制的未知代码，主要是图个安全。有什么功能需求的话可以去项目的github网页上提意见；需要自由写代码的可以试试greasemonkey

There's a feature of "global shortcuts", which allows to run commands anywhere using composed keys.