diff --git a/main.js b/main.js
index 40675639..d7db62b9 100644
--- a/main.js
+++ b/main.js
@@ -279,12 +279,14 @@ function findBurgForMFCG(params) {
   const b = selection[selected].i;
   if (!b) {console.error("Cannot select a burg for MFCG"); return;}
 
-  const referrer = new URL(document.referrer).searchParams;
-  for (let p of referrer) {
+  const referrer = new URL(document.referrer);
+  for (let p of referrer.searchParams) {
     if (p[0] === "size") burgs[b].population = +p[1]; else
+    if (p[0] === "seed") burgs[b].MFCG = +p[1]; else
     if (p[0] === "shantytown") burgs[b].shanty = +p[1]; else
     burgs[b][p[0]] = p[1];
   }
+  burgs[b].MFCGlink = document.referrer;
 
   const label = burgLabels.select("[data-id='" + b + "']");
   if (label.size()) {
diff --git a/modules/ui/burg-editor.js b/modules/ui/burg-editor.js
index c2e26efe..107cfa0f 100644
--- a/modules/ui/burg-editor.js
+++ b/modules/ui/burg-editor.js
@@ -287,11 +287,12 @@ function editBurg(id) {
         Seed should be a number. Default seed is FMG map seed + burg id padded to 4 chars with zeros (${defSeed}). <br>
         Please note that if seed is custom, "Overworld" button from MFCG will open a different map`, {default:burg.MFCG||defSeed, step:1, min:1, max:1e13-1}, v => {
         burg.MFCG = v;
-        openMFCG();
+        openMFCG(v);
       });
     } else openMFCG();
 
-    function openMFCG() {
+    function openMFCG(seed) {
+      if (!seed) openURL(burg.MFCGlink);
       const name = elSelected.text();
       const size = Math.max(Math.min(rn(burg.population), 65), 6);