diff --git a/MozillaFirefox.changes b/MozillaFirefox.changes
index e763bb6..f3569bb 100644
--- a/MozillaFirefox.changes
+++ b/MozillaFirefox.changes
@@ -1,3 +1,36 @@
+-------------------------------------------------------------------
+Sun May  1 21:31:01 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
+
+- Mozilla Firefox 100.0
+  * subtitle support in PiP
+  * spell checking supports multiple languages in parallel
+  * more details here
+    https://www.mozilla.org/en-US/firefox/100.0/releasenotes
+  MFSA 2022-16 (boo#1198970)
+  * CVE-2022-29914 (bmo#1746448)
+    Fullscreen notification bypass using popups
+  * CVE-2022-29909 (bmo#1755081)
+    Bypassing permission prompt in nested browsing contexts
+  * CVE-2022-29916 (bmo#1760674)
+    Leaking browser history with CSS variables
+  * CVE-2022-29911 (bmo#1761981)
+    iframe Sandbox bypass
+  * CVE-2022-29912 (bmo#1692655)
+    Reader mode bypassed SameSite cookies
+  * CVE-2022-29910 (bmo#1757138)
+    Firefox for Android forgot HTTP Strict Transport Security
+    settings
+  * CVE-2022-29915 (bmo#1751678)
+    Leaking cross-origin redirect through the Performance API
+  * CVE-2022-29917 (bmo#1684739, bmo#1706441, bmo#1753298,
+    bmo#1762614, bmo#1762620, bmo#1764778)
+    Memory safety bugs fixed in Firefox 100 and Firefox ESR 91.9
+  * CVE-2022-29918 (bmo#1744043, bmo#1747178, bmo#1753535,
+    bmo#1754017, bmo#1755847, bmo#1756172, bmo#1757477,
+    bmo#1758223, bmo#1760160, bmo#1761481, bmo#1761771)
+    Memory safety bugs fixed in Firefox 100
+- requires NSS 3.77
+
 -------------------------------------------------------------------
 Tue Apr 12 19:30:30 UTC 2022 - Andreas Stieger <andreas.stieger@gmx.de>
 
diff --git a/MozillaFirefox.spec b/MozillaFirefox.spec
index def16c9..90328ae 100644
--- a/MozillaFirefox.spec
+++ b/MozillaFirefox.spec
@@ -28,9 +28,9 @@
 # orig_suffix b3
 # major 69
 # mainver %major.99
-%define major          99
-%define mainver        %major.0.1
-%define orig_version   99.0.1
+%define major          100
+%define mainver        %major.0
+%define orig_version   100.0
 %define orig_suffix    %{nil}
 %define update_channel release
 %define branding       1
@@ -114,7 +114,7 @@ BuildRequires:  libiw-devel
 BuildRequires:  libproxy-devel
 BuildRequires:  makeinfo
 BuildRequires:  mozilla-nspr-devel >= 4.33
-BuildRequires:  mozilla-nss-devel >= 3.76.1
+BuildRequires:  mozilla-nss-devel >= 3.77
 BuildRequires:  nasm >= 2.14
 BuildRequires:  nodejs >= 10.22.1
 %if 0%{?sle_version} >= 120000 && 0%{?sle_version} < 150000
diff --git a/firefox-100.0.source.tar.xz b/firefox-100.0.source.tar.xz
new file mode 100644
index 0000000..8bce992
--- /dev/null
+++ b/firefox-100.0.source.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:664c0cc4e0fb70886aa4e652d144996045d533a18eebc7d61093103cbb2d5e7f
+size 487179576
diff --git a/firefox-100.0.source.tar.xz.asc b/firefox-100.0.source.tar.xz.asc
new file mode 100644
index 0000000..e91f761
--- /dev/null
+++ b/firefox-100.0.source.tar.xz.asc
@@ -0,0 +1,16 @@
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+
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+-----END PGP SIGNATURE-----
diff --git a/firefox-99.0.1.source.tar.xz b/firefox-99.0.1.source.tar.xz
deleted file mode 100644
index c0752ea..0000000
--- a/firefox-99.0.1.source.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:76d22279ce99588a728bb2d034064be0d5918b5900631f2148d4565b8a72e00b
-size 483537764
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deleted file mode 100644
index 31ee850..0000000
--- a/firefox-99.0.1.source.tar.xz.asc
+++ /dev/null
@@ -1,16 +0,0 @@
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diff --git a/l10n-100.0.tar.xz b/l10n-100.0.tar.xz
new file mode 100644
index 0000000..7ac12a1
--- /dev/null
+++ b/l10n-100.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:131c6ea39bf44e0d55d176151b8f002d0394a7bc50568ddb197d238abeed4f70
+size 49952564
diff --git a/l10n-99.0.1.tar.xz b/l10n-99.0.1.tar.xz
deleted file mode 100644
index 0a49c84..0000000
--- a/l10n-99.0.1.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c3e3e54b5e9357a14286af19728e0dd148eb0647b81d1e0b56077988037f3d91
-size 49848672
diff --git a/tar_stamps b/tar_stamps
index bad4bc5..a5c6c47 100644
--- a/tar_stamps
+++ b/tar_stamps
@@ -1,10 +1,10 @@
 PRODUCT="firefox"
 CHANNEL="release"
-VERSION="99.0.1"
+VERSION="100.0"
 VERSION_SUFFIX=""
-PREV_VERSION="99.0"
+PREV_VERSION="99.0.1"
 PREV_VERSION_SUFFIX=""
 #SKIP_LOCALES="" # Uncomment to skip l10n and compare-locales-generation
 RELEASE_REPO="https://hg.mozilla.org/releases/mozilla-release"
-RELEASE_TAG="0f814a8ab240bb6df6bbc5a88865f979e03f0f68"
-RELEASE_TIMESTAMP="20220411174855"
+RELEASE_TAG="1c7f7adc90e2b4c8d64548938bb1499033c5be8f"
+RELEASE_TIMESTAMP="20220428192727"