diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index be7ed02..80e92ad 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,32 @@
+-------------------------------------------------------------------
+Sun Apr 18 07:21:01 UTC 2021 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Thunderbird 78.10.0
+  MFSA 2021-14 (bsc#1184960)
+  * CVE-2021-23994 (bmo#1699077)
+    Out of bound write due to lazy initialization
+  * CVE-2021-23995 (bmo#1699835)
+    Use-after-free in Responsive Design Mode
+  * CVE-2021-23998 (bmo#1667456)
+    Secure Lock icon could have been spoofed
+  * CVE-2021-23961 (bmo#1677940)
+    More internal network hosts could have been probed by a
+    malicious webpage
+  * CVE-2021-23999 (bmo#1691153)
+    Blob URLs may have been granted additional privileges
+  * CVE-2021-24002 (bmo#1702374)
+    Arbitrary FTP command execution on FTP servers using an
+    encoded URL
+  * CVE-2021-29945 (bmo#1700690)
+    Incorrect size computation in WebAssembly JIT could lead to
+    null-reads
+  * CVE-2021-29946 (bmo#1698503)
+    Port blocking could be bypassed
+  * CVE-2021-29948 (bmo#1692899)
+    Race condition when reading from disk while verifying
+    signatures
+- recommend libotr5
+
 -------------------------------------------------------------------
 Sat Apr 10 11:39:37 UTC 2021 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index a2aa963..2436575 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -26,8 +26,8 @@
 # major 69
 # mainver %major.99
 %define major          78
-%define mainver        %major.9.1
-%define orig_version   78.9.1
+%define mainver        %major.10.0
+%define orig_version   78.10.0
 %define orig_suffix    %{nil}
 %define update_channel release
 %define source_prefix  thunderbird-%{orig_version}
@@ -212,6 +212,7 @@ PreReq:         textutils
 %requires_ge    mozilla-nss
 %requires_ge    libfreetype6
 Recommends:     libcanberra0
+Recommends:     libotr5
 Recommends:     libpulse0
 Requires(post): desktop-file-utils
 Requires(postun):desktop-file-utils
diff --git a/l10n-78.10.0.tar.xz b/l10n-78.10.0.tar.xz
new file mode 100644
index 0000000..73289cc
--- /dev/null
+++ b/l10n-78.10.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:818e75ee4dd22518794fb278cac1caeac9d668a94c43efa3383159107d2cc9de
+size 29110752
diff --git a/l10n-78.9.1.tar.xz b/l10n-78.9.1.tar.xz
deleted file mode 100644
index d887ce5..0000000
--- a/l10n-78.9.1.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:668c8a0192f6860291b21a0677ec7fd760d93880c6a7d1648d55f43b407d0ade
-size 29063968
diff --git a/tar_stamps b/tar_stamps
index 9e33124..0450966 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="thunderbird"
 CHANNEL="esr78"
-VERSION="78.9.1"
+VERSION="78.10.0"
 VERSION_SUFFIX=""
-PREV_VERSION="78.9.0"
+PREV_VERSION="78.9.1"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/comm-esr78"
-RELEASE_TAG="f3f1f4a0e32abbc74dfac8c697044c10d0d25cad"
-RELEASE_TIMESTAMP="20210406220621"
+RELEASE_TAG="ca53556517b609ca2e9a8b7578a4f4dc1273b32f"
+RELEASE_TIMESTAMP="20210415215055"
diff --git a/thunderbird-78.10.0.source.tar.xz b/thunderbird-78.10.0.source.tar.xz
new file mode 100644
index 0000000..076ca40
--- /dev/null
+++ b/thunderbird-78.10.0.source.tar.xz
@@ -0,0 +1,3 @@
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+oid sha256:65d79a557027a3b52cc672ab9aea8da7131e6373f94657d03f6d6b9c7b36fb45
+size 351422752
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new file mode 100644
index 0000000..afc38ab
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