security exploit in edge

i have read one article about Universal XSS uXSS,it's terrible!it can steak whole website cookie in specific browser.

emmm,idk what xss injection like excel with vba?emmm,i know whats u mean,open the page then click mouse mid key to open edge webview2(real appearance behind the setting page).
i felt well it can be check in browser on this way back.I think it should be made by selective.

>cfos speed only needs one running edge window to generate its results.

>having multiple processes of edge allows for xss injection

a::use firefox engine
b::consolidate to a single process with multiple arguments