diff --git a/conf/distributions b/conf/distributions
index 8a1a27fa3cbbaaaffff51fc2348ce782ddc7fc11..f4569a7ab949eb02686f8a368dd8b3683277ff80 100644
--- a/conf/distributions
+++ b/conf/distributions
@@ -145,7 +145,7 @@ DscIndices: Sources Release .gz .bz2
 Log: ubuntu-clean.log
 Description: Ubuntu trusty updates mirror (main and universe)
 SignWith: B4EFB9F38D8AEBF1
-Update: trusty-updates
+Update: trusty-updates trusty-ubuntu-mozilla-security
 
 Origin: Ubuntu
 Label: Ubuntu
@@ -159,7 +159,7 @@ DscIndices: Sources Release .gz .bz2
 Log: ubuntu-clean.log
 Description: Ubuntu trusty mirror (main and universe)
 SignWith: B4EFB9F38D8AEBF1
-Update: trusty-security
+Update: trusty-security trusty-ubuntu-mozilla-security
 
 Origin: Ubuntu
 Label: Ubuntu
@@ -204,7 +204,7 @@ DscIndices: Sources Release .gz .bz2
 Log: ubuntu-clean.log
 Description: Ubuntu xenial updates mirror (main and universe)
 SignWith: B4EFB9F38D8AEBF1
-Update: xenial-updates
+Update: xenial-updates xenial-ubuntu-mozilla-security
 
 Origin: Ubuntu
 Label: Ubuntu
@@ -218,7 +218,7 @@ DscIndices: Sources Release .gz .bz2
 Log: ubuntu-clean.log
 Description: Ubuntu xenial mirror (main and universe)
 SignWith: B4EFB9F38D8AEBF1
-Update: xenial-security
+Update: xenial-security xenial-ubuntu-mozilla-security
 
 Origin: Ubuntu
 Label: Ubuntu
diff --git a/conf/updates b/conf/updates
index 28edfb28a09ec79c4c00701343719e4fc5b20d7c..9813430106617660ef162921985948c7279df718 100644
--- a/conf/updates
+++ b/conf/updates
@@ -120,3 +120,19 @@ Components: main>main universe>main
 VerifyRelease: 3F272F5B|437D05B5|8D8AEBF1
 FilterSrcList: install purge-xenial
 
+# FIREFOX ######################################################
+
+Name: trusty-ubuntu-mozilla-security
+Method: http://ppa.launchpad.net/ubuntu-mozilla-security/ppa/ubuntu
+Suite: trusty
+Components: main>main
+UDebComponents: main>main
+VerifyRelease: 7EBC211F
+
+Name: xenial-ubuntu-mozilla-security
+Method: http://ppa.launchpad.net/ubuntu-mozilla-security/ppa/ubuntu
+Suite: xenial
+Components: main>main
+UDebComponents: main>main
+VerifyRelease: 7EBC211F
+