This will do it — even though you don't see "ecency.com" listed there, it will still work:
javascript:(function(){location.assign("http://" + ((location.hostname == "www.hive.blog") ? "peakd.com" : "stemgeeks.net") + ((location.pathname.split("/")[1].indexOf("@") == -1) ? location.pathname : ("/" + location.pathname.split("/")[1])))})();
NOTE: This script will not work for all Tribes, as some Tribes filter posts from the Hive blockchain instead of showing all posts from Hive. For instance, LeoFinance will not show any post that does not have the #leofinance hashtag, so such a script would fail on that Tribe. Fortunately, STEMgeeks does not filter in that same way, so be glad that you chose a Tribe where this will work!
That is awesome! Thank you so much for your help with this.