--- a/build/moz.configure/java.configure
+++ b/build/moz.configure/java.configure
@@ -39,17 +39,17 @@ def check_java_tool(tool):
             die("The program %s was not found.  Set $JAVA_HOME to your Java "
                 "SDK directory or use '--with-java-bin-path={java-bin-dir}'"
                 % tool)
         return result
 
     return require_tool
 
 
-java = check_java_tool('java')
+check_java_tool('java')
 check_java_tool('javah')
 check_java_tool('jar')
 check_java_tool('jarsigner')
 check_java_tool('keytool')
 javac = check_java_tool('javac')
 
 
 @depends(javac)
@@ -61,56 +61,8 @@ def javac_version(javac):
                                          stderr=subprocess.STDOUT).rstrip()
         version = Version(output.split(' ')[-1])
         if version < '1.8':
             die('javac 1.8 or higher is required (found %s). '
                 'Check the JAVA_HOME environment variable.' % version)
         return version
     except subprocess.CalledProcessError as e:
         die('Failed to get javac version: %s', e.output)
-
-# Proguard detection
-# ========================================================
-@dependable
-@imports('os')
-def proguard_jar_default():
-    # By default, look for proguard.jar in the location to which `mach
-    # bootstrap` or `mach artifact toolchain` will install Proguard.
-    mozbuild_state_dir = os.environ.get('MOZBUILD_STATE_PATH',
-                                        os.path.expanduser(os.path.join('~', '.mozbuild')))
-    return os.path.join(mozbuild_state_dir, 'proguard', 'lib', 'proguard.jar')
-
-# Proguard is really required; we provide a good error message when
-# validating.
-option(env='PROGUARD_JAR', nargs=1, default=proguard_jar_default, help='Path to proguard.jar')
-
-@depends(java, 'PROGUARD_JAR')
-@checking('for proguard.jar version')
-@imports('os')
-@imports('subprocess')
-# Not Python 3 compatible, but neither is the subprocess invocation.
-@imports(_from='exceptions', _import='Exception')
-def valid_proguard(java, proguard_jar):
-    if not proguard_jar or not os.path.isfile(proguard_jar[0]):
-        die('proguard.jar 5.3.3 or higher is required (looked for %s). '
-            'Run |mach artifact install --from-build proguard-jar| or add '
-            '`export PROGUARD_JAR=/path/to/proguard.jar` to your mozconfig.' % proguard_jar[0])
-
-    try:
-        output = subprocess.check_output([java, '-jar', proguard_jar[0]])
-        # Exit code zero shouldn't happen.
-        die('Expected `java -jar {}` to fail (with version in output) but got exit code 0'
-            .format(proguard_jar[0]))
-
-    except subprocess.CalledProcessError as e:
-        # Exit code is non zero and output is like
-        # ProGuard, version 5.3.3
-        # Usage: java proguard.ProGuard [options ...]
-        output = e.output
-
-    version = Version(e.output.splitlines()[0].split(' ')[-1])
-    if version < '5.3.3':
-        die('proguard.jar 5.3.3 or higher is required (found %s). '
-            'Run |mach bootstrap| to upgrade. ' % version)
-
-    return proguard_jar[0]
-
-set_config('PROGUARD_JAR', valid_proguard)

--- a/mobile/android/base/Makefile.in
+++ b/mobile/android/base/Makefile.in
@@ -280,37 +280,37 @@ classycle_jar := $(topsrcdir)/mobile/and
 # sometimes corrupt this information if present (which it does for some of the
 # included libraries). This corruption prevents dex from completing, so we need
 # to get rid of it.  This prevents us from seeing line numbers in stack traces
 # for stack frames inside libraries.
 #
 # This step can occur much earlier than the main Proguard pass: it needs only
 # gecko-R.jar to have been compiled (as that's where the library R.java files
 # end up), but it does block the main Proguard pass.
-.bundled.proguard.deps: gecko-R.jar $(proguard_config_dir)/strip-libs.cfg $(PROGUARD_JAR)
+.bundled.proguard.deps: gecko-R.jar $(proguard_config_dir)/strip-libs.cfg
 	$(REPORT_BUILD)
 	@$(TOUCH) $@
 	$(JAVA) \
 		-Xmx512m -Xms128m \
-		-jar $(PROGUARD_JAR) \
+		-jar $(ANDROID_SDK_ROOT)/tools/proguard/lib/proguard.jar \
 		@$(proguard_config_dir)/strip-libs.cfg \
 		-injars $(subst ::,:,$(java_bundled_libs))\
 		-outjars bundled-jars-nodebug \
 		-libraryjars $(library_jars):gecko-R.jar
 
 # We touch the target file before invoking Proguard so that Proguard's
 # outputs are fresher than the target, preventing a subsequent
 # invocation from thinking Proguard's outputs are stale.  This is safe
 # because Make removes the target file if any recipe command fails.
-.proguard.deps: .geckoview.deps .bundled.proguard.deps $(ALL_JARS) $(proguard_config_dir)/proguard.cfg $(PROGUARD_JAR)
+.proguard.deps: .geckoview.deps .bundled.proguard.deps $(ALL_JARS) $(proguard_config_dir)/proguard.cfg
 	$(REPORT_BUILD)
 	@$(TOUCH) $@
 	$(JAVA) \
 		-Xmx512m -Xms128m \
-		-jar $(PROGUARD_JAR) \
+		-jar $(ANDROID_SDK_ROOT)/tools/proguard/lib/proguard.jar \
 		@$(proguard_config_dir)/proguard.cfg \
 		-optimizationpasses $(PROGUARD_PASSES) \
 		-injars $(subst ::,:,$(all_jars_classpath)):bundled-jars-nodebug \
 		-outjars jars-proguarded \
 		-libraryjars $(library_jars)
 
 ANNOTATION_PROCESSOR_JAR_FILES := $(abspath $(DEPTH)/build/annotationProcessors/annotationProcessors.jar)
 

--- a/mobile/android/config/mozconfigs/common
+++ b/mobile/android/config/mozconfigs/common
@@ -103,10 +103,8 @@ fi
 export SOCORRO_SYMBOL_UPLOAD_TOKEN_FILE=/builds/crash-stats-api.token
 
 # Package js shell.
 export MOZ_PACKAGE_JSSHELL=1
 
 . "$topsrcdir/build/unix/mozconfig.stdcxx"
 
 JS_BINARY="$topsrcdir/mobile/android/config/js_wrapper.sh"
-
-export PROGUARD_JAR="$topsrcdir/proguard/lib/proguard.jar"

--- a/taskcluster/ci/l10n/kind.yml
+++ b/taskcluster/ci/l10n/kind.yml
@@ -41,21 +41,16 @@ job-template:
          android-api-16-l10n: 18000
    docker-image:
       by-build-platform:
          default:
            in-tree: desktop-build
          android-api-16-l10n:
            in-tree: android-build
          win.*: null
-   toolchains:
-      by-build-platform:
-         default: []
-         android-api-16-l10n:
-            - proguard-jar
    tooltool:
       by-build-platform:
          default: public
          android-api-16-l10n: internal
          macosx64-nightly: internal
    worker-type:
       by-build-platform:
          default: aws-provisioner-v1/gecko-{level}-b-linux

--- a/taskcluster/ci/nightly-l10n/kind.yml
+++ b/taskcluster/ci/nightly-l10n/kind.yml
@@ -44,21 +44,16 @@ job-template:
          android-api-16-nightly: 18000
    docker-image:
       by-build-platform:
          default:
            in-tree: desktop-build
          android-api-16-nightly:
            in-tree: android-build
          win.*: null
-   toolchains:
-      by-build-platform:
-         default: []
-         android-api-16-nightly:
-            - proguard-jar
    tooltool:
       by-build-platform:
          default: public
          android-api-16-nightly: internal
          macosx64-nightly: internal
          win32-nightly: internal
          win64-nightly: internal
    index: