1 files changed, 28 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/injections/js/bug1579159-m.tailieu.vn-pdfjs-worker-disable.js b/browser/extensions/webcompat/injections/js/bug1579159-m.tailieu.vn-pdfjs-worker-disable.js
new file mode 100644
index 0000000000..b6600e93f8
--- /dev/null
+++ b/browser/extensions/webcompat/injections/js/bug1579159-m.tailieu.vn-pdfjs-worker-disable.js
@@ -0,0 +1,28 @@
+"use strict";
+
+/**
+ * m.tailieu.vn - Override PDFJS.disableWorker to be true
+ * WebCompat issue #39057 - https://webcompat.com/issues/39057
+ *
+ * Custom viewer built with PDF.js is not working in Firefox for Android
+ * Disabling worker to match Chrome behavior fixes the issue
+ */
+
+/* globals exportFunction */
+
+console.info(
+  "window.PDFJS.disableWorker has been set to true for compatibility reasons. See https://webcompat.com/issues/39057 for details."
+);
+
+let globals = {};
+
+Object.defineProperty(window.wrappedJSObject, "PDFJS", {
+  get: exportFunction(function() {
+    return globals;
+  }, window),
+
+  set: exportFunction(function(value = {}) {
+    globals = value;
+    globals.disableWorker = true;
+  }, window),
+});