diff --git a/package/x11/firefox/firefox.desc b/package/x11/firefox/firefox.desc
index 9859c54d9..4b9258383 100644
--- a/package/x11/firefox/firefox.desc
+++ b/package/x11/firefox/firefox.desc
@@ -32,6 +32,7 @@
 [M] The ROCK Linux Project
 
 [C] extra/office
+[F] CORE
 
 [L] MPL
 [S] Beta
diff --git a/package/x11/mozilla/mozilla.desc b/package/x11/mozilla/mozilla.desc
index ac494d8ac..1e677fe4b 100644
--- a/package/x11/mozilla/mozilla.desc
+++ b/package/x11/mozilla/mozilla.desc
@@ -41,7 +41,6 @@
 [M] The ROCK Linux Project
 
 [C] extra/office
-[F] CORE
 
 [L] MPL
 [S] Stable
diff --git a/package/x11/thunderbird/thunderbird.desc b/package/x11/thunderbird/thunderbird.desc
index 301a4b4f6..1171aca58 100644
--- a/package/x11/thunderbird/thunderbird.desc
+++ b/package/x11/thunderbird/thunderbird.desc
@@ -33,6 +33,7 @@
 [M] The ROCK Linux Project
 
 [C] extra/office
+[F] CORE
 
 [L] MPL
 [S] Stable