extension: Give precedence to toggles over default options (fixes #5825)

Also fixes #5696

web/packages/core/src/public-api.ts

@@ -12,7 +12,10 @@ declare global {
          * [[PublicAPI]] instance itself.
          */
         RufflePlayer?:
-            | { config?: DataLoadOptions | URLLoadOptions | object }
+            | {
+                  config?: DataLoadOptions | URLLoadOptions | object;
+                  conflict?: Record<string, unknown> | null;
+              }
             | PublicAPI;
     }
 }
@@ -33,11 +36,11 @@ export class PublicAPI {
      * The configuration object used when Ruffle is instantiated.
      */
     config: DataLoadOptions | URLLoadOptions | object;
+    conflict: Record<string, unknown> | null;
 
     private sources: Record<string, typeof SourceAPI>;
     private invoked: boolean;
     private newestName: string | null;
-    private conflict: Record<string, unknown> | null;
 
     /**
      * Construct the Ruffle public API.

web/packages/core/src/ruffle-player.ts

@@ -666,6 +666,13 @@ export class RufflePlayer extends HTMLElement {
         try {
             this.loadedConfig = {
                 ...DEFAULT_CONFIG,
+                ...(window.RufflePlayer?.conflict &&
+                window.RufflePlayer?.conflict["newestName"] === "extension"
+                    ? (window.RufflePlayer?.conflict["config"] as Record<
+                          string,
+                          unknown
+                      >)
+                    : {}),
                 ...(window.RufflePlayer?.config ?? {}),
                 ...this.config,
                 ...options,

web/packages/extension/src/ruffle.ts

@@ -16,8 +16,8 @@ function handleMessage(message: Message) {
         case "load": {
             const api = window.RufflePlayer ?? {};
             api.config = {
-                ...api.config,
                 ...message.config,
+                ...api.config,
             };
             window.RufflePlayer = PublicAPI.negotiate(api, "extension");
             return {};