create script which Run multiple instances -no china

I currently have a chrome extension which I use with 2 browsers simultaneously, I run 2 instances of chrome and then use an extension which automates logging into a website. I am now looking for a way to progress this further and need someone to be able to create a graphical interface which will allow for multiple instances of this process to be run at once (for example upto 20 instances of the same task). I would prefer for this to have as minimal demand as possible on the computer therefore if it would be possible to make the task’s essentially be running in headless mode that would be ideal. To summarise what you will be required to do: • Be able to create a simple interface to run my desired command • Allow for me to essentially setup one Chrome browser with the task I wish to be completed and then this task be run by multiple other instances of chrome in the exact same way Fundamentally it requires me to setup one Chrome browser with the extension I require installed and then I just want this exact process to be run by multiple instances.