diff --git a/src/webpage/favorites.ts b/src/webpage/favorites.ts
index f65f6cf..3ffb611 100644
--- a/src/webpage/favorites.ts
+++ b/src/webpage/favorites.ts
@@ -38,44 +38,7 @@ type favandfreqimp = Omit<
 	| "heard_sound_frecency"
 	| "played_sound_frecency"
 >;
-Set.prototype.intersection ||= function <T>(set: Set<T>) {
-	const newSet = new Set();
-	for (const elm of this) {
-		if (set.has(elm)) {
-			newSet.add(elm);
-		}
-	}
-	return newSet;
-};
-Set.prototype.difference ||= function <T>(set: Set<T>) {
-	const newSet = new Set();
-	for (const elm of this) {
-		if (!set.has(elm)) {
-			newSet.add(elm);
-		}
-	}
-	return newSet;
-};
-Set.prototype.symmetricDifference ||= function <T>(set: Set<T>) {
-	const newSet = new Set();
-	for (const elm of this) {
-		if (!set.has(elm)) {
-			newSet.add(elm);
-		}
-	}
-	for (const elm of set) {
-		if (!this.has(elm)) {
-			newSet.add(elm);
-		}
-	}
-	return newSet;
-};
-Set.prototype.isDisjointFrom ||= function <T>(set: Set<T>) {
-	return this.symmetricDifference(set).size === 0;
-};
-Set.prototype.union ||= function <T>(set: Set<T>) {
-	return new Set([...this, ...set]);
-};
+
 export class Favorites {
 	owner: Localuser;
 	// ----- stuff that needs to store ----
diff --git a/src/webpage/index.ts b/src/webpage/index.ts
index 425dd38..e436822 100644
--- a/src/webpage/index.ts
+++ b/src/webpage/index.ts
@@ -6,6 +6,7 @@ import {MarkDown} from "./markdown.js";
 import {Message} from "./message.js";
 import {File} from "./file.js";
 import {I18n} from "./i18n.js";
+import "./utils/pollyfills.js";
 if (window.location.pathname === "/app") {
 	window.location.pathname = "/channels/@me";
 }
diff --git a/src/webpage/utils/pollyfills.ts b/src/webpage/utils/pollyfills.ts
new file mode 100644
index 0000000..961018b
--- /dev/null
+++ b/src/webpage/utils/pollyfills.ts
@@ -0,0 +1,38 @@
+Set.prototype.intersection ||= function <T>(set: Set<T>) {
+	const newSet = new Set();
+	for (const elm of this) {
+		if (set.has(elm)) {
+			newSet.add(elm);
+		}
+	}
+	return newSet;
+};
+Set.prototype.difference ||= function <T>(set: Set<T>) {
+	const newSet = new Set();
+	for (const elm of this) {
+		if (!set.has(elm)) {
+			newSet.add(elm);
+		}
+	}
+	return newSet;
+};
+Set.prototype.symmetricDifference ||= function <T>(set: Set<T>) {
+	const newSet = new Set();
+	for (const elm of this) {
+		if (!set.has(elm)) {
+			newSet.add(elm);
+		}
+	}
+	for (const elm of set) {
+		if (!this.has(elm)) {
+			newSet.add(elm);
+		}
+	}
+	return newSet;
+};
+Set.prototype.isDisjointFrom ||= function <T>(set: Set<T>) {
+	return this.symmetricDifference(set).size === 0;
+};
+Set.prototype.union ||= function <T>(set: Set<T>) {
+	return new Set([...this, ...set]);
+};