probably not,JS scripts can not work across different tabs.
no. I think even browser extension couldn't do that
But you can simulate that action.
Someone can make 1 script to work only in 1 specific url.Then every time that that url is opened the script can send the same keystrokes to all tabs that have that url/link opened.
For example if you want to open www.google.com a lot of times in different tabs, you/someone can make a script that will search for the same word on every www.google.com opened link/tab.
Script creation/ finding request- please click to see message
Is there a script where, when turned on, makes all tabs enter the same keystrokes and mouse movements that you enter on one master tab?