diff --git a/remote/shared/TabManager.jsm b/remote/shared/TabManager.jsm
index 0f4b1e1f9061..bfebcbc65c0b 100644
--- a/remote/shared/TabManager.jsm
+++ b/remote/shared/TabManager.jsm
@@ -27,7 +27,7 @@ var TabManager = {
    *     All the found <xul:browser>s. Will return an empty array if
    *     no windows and tabs can be found.
    */
-  browsers() {
+  get browsers() {
     const browsers = [];
 
     for (const win of this.windows) {
diff --git a/remote/shared/messagehandler/transports/FrameTransport.jsm b/remote/shared/messagehandler/transports/FrameTransport.jsm
index 31ecf2d6cc18..cf508cf1b691 100644
--- a/remote/shared/messagehandler/transports/FrameTransport.jsm
+++ b/remote/shared/messagehandler/transports/FrameTransport.jsm
@@ -144,7 +144,7 @@ class FrameTransport {
     let browsingContexts = [];
 
     // Fetch all tab related browsing contexts for top-level windows.
-    for (const { browsingContext } of TabManager.browsers()) {
+    for (const { browsingContext } of TabManager.browsers) {
       if (isBrowsingContextCompatible(browsingContext, { browserId })) {
         browsingContexts = browsingContexts.concat(
           browsingContext.getAllBrowsingContextsInSubtree()