diff -Nru thunderbird-78.2.1+build1/debian/changelog thunderbird-78.2.1+build1/debian/changelog
--- thunderbird-78.2.1+build1/debian/changelog	2020-08-30 11:57:53.000000000 +0300
+++ thunderbird-78.2.1+build1/debian/changelog	2020-09-11 10:31:50.000000000 +0300
@@ -1,3 +1,10 @@
+thunderbird (1:78.2.1+build1-0ubuntu1~~ubuntu2004~3) focal; urgency=medium
+
+  * backport
+  * force-nodejs-version.patch: Force 20.04's nodejs version.
+
+ -- Timo Jyrinki <timo.jyrinki@iki.fi>  Fri, 11 Sep 2020 10:31:50 +0300
+
 thunderbird (1:78.2.1+build1-0ubuntu1) groovy; urgency=medium
 
   * New upstream stable release (78.2.1build1)
diff -Nru thunderbird-78.2.1+build1/debian/control thunderbird-78.2.1+build1/debian/control
--- thunderbird-78.2.1+build1/debian/control	2020-08-30 11:57:53.000000000 +0300
+++ thunderbird-78.2.1+build1/debian/control	2020-09-11 10:31:50.000000000 +0300
@@ -45,7 +45,7 @@
 	llvm-10-dev | llvm-9-dev | llvm-8-dev,
 	cargo (>= 0.42),
 	rustc (>= 1.41.0),
-	nodejs (>= 10.21)
+	nodejs (>= 8.10)
 Standards-Version: 3.9.1
 #XS-Testsuite: autopkgtest
 
diff -Nru thunderbird-78.2.1+build1/debian/control.in thunderbird-78.2.1+build1/debian/control.in
--- thunderbird-78.2.1+build1/debian/control.in	2020-08-30 11:57:53.000000000 +0300
+++ thunderbird-78.2.1+build1/debian/control.in	2020-09-11 10:31:50.000000000 +0300
@@ -45,7 +45,7 @@
 	llvm-10-dev | llvm-9-dev | llvm-8-dev,
 	cargo (>= 0.42),
 	rustc (>= 1.41.0),
-	nodejs (>= 10.21)
+	nodejs (>= 8.10)
 Standards-Version: 3.9.1
 #XS-Testsuite: autopkgtest
 
diff -Nru thunderbird-78.2.1+build1/debian/patches/force-nodejs-version.patch thunderbird-78.2.1+build1/debian/patches/force-nodejs-version.patch
--- thunderbird-78.2.1+build1/debian/patches/force-nodejs-version.patch	1970-01-01 02:00:00.000000000 +0200
+++ thunderbird-78.2.1+build1/debian/patches/force-nodejs-version.patch	2020-09-11 10:31:50.000000000 +0300
@@ -0,0 +1,27 @@
+--- a/python/mozbuild/mozbuild/nodeutil.py	2020-08-30 12:13:52.000000000 +0300
++++ b/python/mozbuild/mozbuild/nodeutil.py	2020-09-11 13:14:59.685870686 +0300
+@@ -15,7 +15,7 @@
+ from mozfile import which
+ from six import PY3
+ 
+-NODE_MIN_VERSION = StrictVersion("10.21.0")
++NODE_MIN_VERSION = StrictVersion("10.19.0")
+ NPM_MIN_VERSION = StrictVersion("6.14.4")
+ 
+ 
+--- a/browser/components/newtab/package.json	2020-08-30 12:13:22.000000000 +0300
++++ b/browser/components/newtab/package.json	2020-09-11 13:15:45.025843645 +0300
+@@ -65,7 +65,7 @@
+   "engines": {
+     "firefox": ">=45.0 <=*",
+     "//": "when changing node versions, also edit .nvmrc",
+-    "node": "10.21.*",
++    "node": "10.19.*",
+     "npm": "6.14.4"
+   },
+   "homepage": "https://github.com/mozilla/activity-stream",
+--- a/browser/components/newtab/.nvmrc	2020-08-30 12:13:22.000000000 +0300
++++ b/browser/components/newtab/.nvmrc	2020-09-11 13:16:13.229825920 +0300
+@@ -1 +1 @@
+-10.21.0
++10.19.0
diff -Nru thunderbird-78.2.1+build1/debian/patches/series thunderbird-78.2.1+build1/debian/patches/series
--- thunderbird-78.2.1+build1/debian/patches/series	2020-07-14 17:08:02.000000000 +0300
+++ thunderbird-78.2.1+build1/debian/patches/series	2020-09-11 10:31:50.000000000 +0300
@@ -12,3 +12,4 @@
 s390x-fix-hidden-symbol.patch
 armhf-clang-no-integrated-as-for-neon.patch
 s390x-workaround-sqlite3-clang-optimization-hang.patch
+force-nodejs-version.patch