From d93d21fdfd5a0e5fa4eef390e7c59319c56611ad Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Fri, 26 Aug 2022 21:42:06 +0200
Subject: [PATCH] Always focus the `viewerContainer` when entering
 PresentationMode (bug 1787456)

This fixes the regression in [bug 1787456](https://bugzilla.mozilla.org/show_bug.cgi?id=1787456), assuming that it should be handled on the PDF.js side.
---
 web/pdf_presentation_mode.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/web/pdf_presentation_mode.js b/web/pdf_presentation_mode.js
index d1dc07821..07ff6125e 100644
--- a/web/pdf_presentation_mode.js
+++ b/web/pdf_presentation_mode.js
@@ -99,6 +99,7 @@ class PDFPresentationMode {
 
     try {
       await promise;
+      pdfViewer.focus(); // Fixes bug 1787456.
       return true;
     } catch (reason) {
       this.#removeFullscreenChangeListeners();