Log in on each browser you use and one press of Fuzz or Test fuzz runs the vector in all of them, with every browser's results side by side.
This vector shows what characters used in a multiline string after the backslash
Unable to render tweet button
"x\$[chr]"==="x" && log($[i])
"x\ "==="x" && alert(10)
"x\ "==="x" && alert(13)
"x\ "==="x" && alert(8232)
"x\ "==="x" && alert(8233)
4
4
4
4