--- a/mobile/android/base/moz.build
+++ b/mobile/android/base/moz.build
@@ -97,16 +97,17 @@ mgjar.sources += [geckoview_source_dir +
     'mozglue/GeckoLoader.java',
     'mozglue/JNIObject.java',
     'mozglue/NativeReference.java',
     'mozglue/NativeZip.java',
     'mozglue/SafeIntent.java',
 ]]
 mgjar.generated_sources = [] # Keep it this way.
 mgjar.extra_jars += [
+    CONFIG['ANDROID_SUPPORT_ANNOTATIONS_JAR_LIB'],
     'constants.jar',
 ]
 mgjar.javac_flags += ['-Xlint:all']
 
 gujar = add_java_jar('gecko-util')
 gujar.sources += [geckoview_source_dir + 'java/org/mozilla/gecko/' + x for x in [
     'util/ActivityResultHandler.java',
     'util/ActivityResultHandlerMap.java',

new file mode 100644
--- /dev/null
+++ b/mobile/android/config/proguard/proguard-android.cfg
@@ -0,0 +1,78 @@
+# This is a configuration file for ProGuard.
+# http://proguard.sourceforge.net/index.html#manual/usage.html
+#
+# Starting with version 2.2 of the Android plugin for Gradle, these files are no longer used. Newer
+# versions are distributed with the plugin and unpacked at build time. Files in this directory are
+# no longer maintained.
+
+-dontusemixedcaseclassnames
+-dontskipnonpubliclibraryclasses
+-verbose
+
+# Optimization is turned off by default. Dex does not like code run
+# through the ProGuard optimize and preverify steps (and performs some
+# of these optimizations on its own).
+-dontoptimize
+-dontpreverify
+# Note that if you want to enable optimization, you cannot just
+# include optimization flags in your own project configuration file;
+# instead you will need to point to the
+# "proguard-android-optimize.txt" file instead of this one from your
+# project.properties file.
+
+-keepattributes *Annotation*
+-keep public class com.google.vending.licensing.ILicensingService
+-keep public class com.android.vending.licensing.ILicensingService
+
+# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+# keep setters in Views so that animations can still work.
+# see http://proguard.sourceforge.net/manual/examples.html#beans
+-keepclassmembers public class * extends android.view.View {
+   void set*(***);
+   *** get*();
+}
+
+# We want to keep methods in Activity that could be used in the XML attribute onClick
+-keepclassmembers class * extends android.app.Activity {
+   public void *(android.view.View);
+}
+
+# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keepclassmembers class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator CREATOR;
+}
+
+-keepclassmembers class **.R$* {
+    public static <fields>;
+}
+
+# The support library contains references to newer platform versions.
+# Don't warn about those in case this app is linking against an older
+# platform version.  We know about them, and they are safe.
+-dontwarn android.support.**
+
+# Understand the @Keep support annotation.
+-keep class android.support.annotation.Keep
+
+-keep @android.support.annotation.Keep class * {*;}
+
+-keepclasseswithmembers class * {
+    @android.support.annotation.Keep <methods>;
+}
+
+-keepclasseswithmembers class * {
+    @android.support.annotation.Keep <fields>;
+}
+
+-keepclasseswithmembers class * {
+    @android.support.annotation.Keep <init>(...);
+}

--- a/mobile/android/config/proguard/proguard.cfg
+++ b/mobile/android/config/proguard/proguard.cfg
@@ -262,8 +262,10 @@
 # See: http://stackoverflow.com/questions/22441366/note-android-support-v4-text-icucompatics-cant-find-dynamically-referenced-cl
 -dontnote android.support.**
 
 -include "adjust-keeps.cfg"
 
 -include "leakcanary-keeps.cfg"
 
 -include "appcompat-v7-keeps.cfg"
+
+-include "proguard-android.cfg"