diff --git a/src/serviceworker/index.ts b/src/serviceworker/index.ts
index 736b536613..fc3e04fd51 100644
--- a/src/serviceworker/index.ts
+++ b/src/serviceworker/index.ts
@@ -25,13 +25,13 @@ const serverSupportMap: {
     };
 } = {};
 
-self.addEventListener("install", (event) => {
+global.addEventListener("install", (event) => {
     // We skipWaiting() to update the service worker more frequently, particularly in development environments.
     // @ts-expect-error - service worker types are not available. See 'fetch' event handler.
     event.waitUntil(skipWaiting());
 });
 
-self.addEventListener("activate", (event) => {
+global.addEventListener("activate", (event) => {
     // We force all clients to be under our control, immediately. This could be old tabs.
     // @ts-expect-error - service worker types are not available. See 'fetch' event handler.
     event.waitUntil(clients.claim());
@@ -40,7 +40,7 @@ self.addEventListener("activate", (event) => {
 // @ts-expect-error - the service worker types conflict with the DOM types available through TypeScript. Many hours
 // have been spent trying to convince the type system that there's no actual conflict, but it has yet to work. Instead
 // of trying to make it do the thing, we force-cast to something close enough where we can (and ignore errors otherwise).
-self.addEventListener("fetch", (event: FetchEvent) => {
+global.addEventListener("fetch", (event: FetchEvent) => {
     // This is the authenticated media (MSC3916) check, proxying what was unauthenticated to the authenticated variants.
 
     if (event.request.method !== "GET") {
@@ -72,7 +72,7 @@ self.addEventListener("fetch", (event: FetchEvent) => {
 
                 // Locate our access token, and populate the fetchConfig with the authentication header.
                 // @ts-expect-error - service worker types are not available. See 'fetch' event handler.
-                const client = await self.clients.get(event.clientId);
+                const client = await global.clients.get(event.clientId);
                 accessToken = await getAccessToken(client);
 
                 // Update or populate the server support map using a (usually) authenticated `/versions` call.
@@ -166,9 +166,9 @@ async function askClientForUserIdParams(client: unknown): Promise<{ userId: stri
             if (event.data?.responseKey !== responseKey) return; // not for us
             clearTimeout(timeoutId); // do this as soon as possible, avoiding a race between resolve and reject.
             resolve(event.data); // "unblock" the remainder of the thread, if that were such a thing in JavaScript.
-            self.removeEventListener("message", listener); // cleanup, since we're not going to do anything else.
+            global.removeEventListener("message", listener); // cleanup, since we're not going to do anything else.
         };
-        self.addEventListener("message", listener);
+        global.addEventListener("message", listener);
 
         // Ask the tab for the information we need. This is handled by WebPlatform.
         (client as Window).postMessage({ responseKey, type: "userinfo" });