diff --git a/MozillaFirefox.changes b/MozillaFirefox.changes
index 5fab1d0..bec9787 100644
--- a/MozillaFirefox.changes
+++ b/MozillaFirefox.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jul 17 01:28:49 UTC 2020 - Atri Bhattacharya <badshah400@gmail.com>
+
+- Add mozilla-libavcodec58_91.patch to link against updated
+  soversion of libavcodec (58.91) with ffmpeg >= 4.3.
+
 -------------------------------------------------------------------
 Sat Jul 11 11:08:06 UTC 2020 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaFirefox.spec b/MozillaFirefox.spec
index 89b3699..95bb5fa 100644
--- a/MozillaFirefox.spec
+++ b/MozillaFirefox.spec
@@ -208,6 +208,7 @@ Patch24:        mozilla-bmo1602730.patch
 Patch25:        mozilla-bmo998749.patch
 Patch26:        mozilla-bmo1626236.patch
 Patch27:        mozilla-s390x-skia-gradient.patch
+Patch28:        mozilla-libavcodec58_91.patch
 # Firefox/browser
 Patch101:       firefox-kde.patch
 Patch102:       firefox-branded-icons.patch
@@ -349,6 +350,7 @@ cd $RPM_BUILD_DIR/%{srcname}-%{orig_version}
 %patch25 -p1
 %patch26 -p1
 %patch27 -p1
+%patch28 -p1
 # Firefox
 %patch101 -p1
 %patch102 -p1
diff --git a/mozilla-libavcodec58_91.patch b/mozilla-libavcodec58_91.patch
new file mode 100644
index 0000000..7f58c5d
--- /dev/null
+++ b/mozilla-libavcodec58_91.patch
@@ -0,0 +1,20 @@
+Index: firefox-78.0.2/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
+===================================================================
+--- firefox-78.0.2.orig/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
++++ firefox-78.0.2/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
+@@ -30,6 +30,7 @@ static FFmpegLibWrapper sLibAV;
+ static const char* sLibs[] = {
+ // clang-format off
+ #if defined(XP_DARWIN)
++  "libavcodec.58.91.dylib",
+   "libavcodec.58.dylib",
+   "libavcodec.57.dylib",
+   "libavcodec.56.dylib",
+@@ -37,6 +38,7 @@ static const char* sLibs[] = {
+   "libavcodec.54.dylib",
+   "libavcodec.53.dylib",
+ #else
++  "libavcodec.so.58.91",
+   "libavcodec.so.58",
+   "libavcodec-ffmpeg.so.58",
+   "libavcodec-ffmpeg.so.57",