Forgot to mention, I use this bookmarklet with amp-what to change the font to Segoe UI Symbol as that often has more Unicode symbols and is the font used in a lot of the places I tend to use unicode symbols.

      javascript:(function(){var newcss="samp { font-family: Segoe UI Symbol; }";if("\v"=="v"){document.createStyleSheet().cssText=newcss}else{var tag=document.createElement("style");tag.type="text/css";document.getElementsByTagName("head")[0].appendChild(tag);tag[(typeof document.body.style.WebkitAppearance=="string")?"innerText":"innerHTML"]=newcss}})();