diff --git a/src/core/annotation.js b/src/core/annotation.js
index a77767bac..fc0bb208c 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -848,6 +848,9 @@ class Annotation {
    * @param {Array} lineEndings - The line endings array.
    */
   setLineEndings(lineEndings) {
+    if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")) {
+      throw new Error("Not implemented: setLineEndings");
+    }
     this.lineEndings = ["None", "None"]; // The default values.
 
     if (Array.isArray(lineEndings) && lineEndings.length === 2) {
@@ -3932,8 +3935,10 @@ class LineAnnotation extends MarkupAnnotation {
     const lineCoordinates = dict.getArray("L");
     this.data.lineCoordinates = Util.normalizeRect(lineCoordinates);
 
-    this.setLineEndings(dict.getArray("LE"));
-    this.data.lineEndings = this.lineEndings;
+    if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
+      this.setLineEndings(dict.getArray("LE"));
+      this.data.lineEndings = this.lineEndings;
+    }
 
     if (!this.appearance) {
       // The default stroke color is black.
@@ -4107,7 +4112,10 @@ class PolylineAnnotation extends MarkupAnnotation {
     this.data.hasOwnCanvas = this.data.noRotate;
     this.data.vertices = [];
 
-    if (!(this instanceof PolygonAnnotation)) {
+    if (
+      (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) &&
+      !(this instanceof PolygonAnnotation)
+    ) {
       // Only meaningful for polyline annotations.
       this.setLineEndings(dict.getArray("LE"));
       this.data.lineEndings = this.lineEndings;