--- a/python/mozbuild/mozbuild/artifacts.py
+++ b/python/mozbuild/mozbuild/artifacts.py
@@ -538,16 +538,18 @@ class WinArtifactJob(ArtifactJob):
 JOB_DETAILS = {
     'android-api-16-opt': (AndroidArtifactJob, (r'(public/build/fennec-(.*)\.android-arm.apk|public/build/target\.apk)',
                                                 r'public/build/fennec-(.*)\.common\.tests\.(zip|tar\.gz)|'
                                                 r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'android-api-16-debug': (AndroidArtifactJob, (r'public/build/target\.apk',
                                                   r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'android-x86-opt': (AndroidArtifactJob, (r'public/build/target\.apk',
                                              r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
+    'android-x86_64-opt': (AndroidArtifactJob, (r'public/build/target\.apk',
+                                                r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'linux-opt': (LinuxArtifactJob, (r'public/build/target\.tar\.bz2',
                                      r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'linux-debug': (LinuxArtifactJob, (r'public/build/target\.tar\.bz2',
                                        r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'linux64-opt': (LinuxArtifactJob, (r'public/build/target\.tar\.bz2',
                                        r'public/build/target\.common\.tests\.(zip|tar\.gz)')),
     'linux64-debug': (LinuxArtifactJob, (r'public/build/target\.tar\.bz2',
                                          r'public/build/target\.common\.tests\.(zip|tar\.gz)')),

--- a/python/mozrelease/mozrelease/platforms.py
+++ b/python/mozrelease/mozrelease/platforms.py
@@ -2,16 +2,17 @@ from __future__ import absolute_import
 
 # ftp -> update platform map
 update_platform_map = {
     "android": ["Android_arm-eabi-gcc3"],
     "android-api-11": ["Android_arm-eabi-gcc3"],
     "android-api-15": ["Android_arm-eabi-gcc3"],
     "android-api-16": ["Android_arm-eabi-gcc3"],
     "android-x86": ["Android_x86-gcc3"],
+    "android-x86_64": ["Android_x86-64-gcc3"],
     "android-aarch64": ["Android_aarch64-gcc3"],
     "linux-i686": ["Linux_x86-gcc3"],
     "linux-x86_64": ["Linux_x86_64-gcc3"],
     "mac": ["Darwin_x86_64-gcc3-u-i386-x86_64",  # The main platofrm
             "Darwin_x86-gcc3-u-i386-x86_64",
             # We don"t ship builds with these build targets, but some users
             # modify their builds in a way that has them report like these.
             # See bug 1071576 for details.

--- a/taskcluster/ci/build/android.yml
+++ b/taskcluster/ci/build/android.yml
@@ -572,8 +572,127 @@ android-aarch64-nightly/opt:
         - android-ndk-linux
         - android-sdk-linux
         - linux64-clang
         - linux64-rust-android
         - linux64-rust-size
         - linux64-sccache
         - linux64-cbindgen
         - linux64-node
+
+android-x86_64/opt:
+    description: "Android 5.0 x86-64 Opt"
+    index:
+        product: mobile
+        job-name: android-x86_64-opt
+    attributes:
+        enable-full-crashsymbols: true
+    treeherder:
+        platform: android-5-0-x86_64/opt
+        symbol: B
+    worker-type: aws-provisioner-v1/gecko-{level}-b-android
+    worker:
+        docker-image: {in-tree: android-build}
+        max-run-time: 7200
+        env:
+            GRADLE_USER_HOME: "/builds/worker/workspace/build/src/mobile/android/gradle/dotgradle-offline"
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+        artifacts:
+            - name: public/android/R
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/R
+              type: directory
+              # TODO Bug 1433198. Remove the following entry once target.maven.zip is uploaded to a maven repository
+            - name: public/android/maven
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/maven/
+              type: directory
+            - name: public/build/target.maven.zip
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/target.maven.zip
+              type: file
+            - name: public/build/geckoview-androidTest.apk
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/outputs/apk/androidTest/officialWithGeckoBinariesNoMinApi/debug/geckoview-official-withGeckoBinaries-noMinApi-debug-androidTest.apk
+              type: file
+            - name: public/build/geckoview_example.apk
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview_example/outputs/apk/officialWithGeckoBinariesNoMinApi/debug/geckoview_example-official-withGeckoBinaries-noMinApi-debug.apk
+              type: file
+            - name: public/build
+              path: /builds/worker/artifacts/
+              type: directory
+    run:
+        using: mozharness
+        actions: [get-secrets build multi-l10n update]
+        config:
+            - builds/releng_base_android_64_builds.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: x86_64
+        tooltool-downloads: internal
+    toolchains:
+        - android-gradle-dependencies
+        - android-ndk-linux
+        - android-sdk-linux
+        - linux64-clang
+        - linux64-rust-android
+        - linux64-rust-size
+        - linux64-cbindgen
+        - linux64-sccache
+        - linux64-node
+
+android-x86_64-nightly/opt:
+    description: "Android 5.0 x86-64 Nightly"
+    attributes:
+        nightly: true
+        enable-full-crashsymbols: true
+    shipping-phase: promote
+    shipping-product: fennec
+    index:
+        product: mobile
+        job-name: android-x86_64-opt
+        type: nightly
+    treeherder:
+        platform: android-5-0-x86_64/opt
+        symbol: N
+    worker-type: aws-provisioner-v1/gecko-{level}-b-android
+    worker:
+        docker-image: {in-tree: android-build}
+        max-run-time: 7200
+        env:
+            GRADLE_USER_HOME: "/builds/worker/workspace/build/src/mobile/android/gradle/dotgradle-offline"
+            TOOLTOOL_MANIFEST: "mobile/android/config/tooltool-manifests/android-x86/releng.manifest"
+        artifacts:
+            - name: public/android/R
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/R
+              type: directory
+              # TODO Bug 1433198. Remove the following entry once target.maven.zip is uploaded to a maven repository
+            - name: public/android/maven
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/maven/
+              type: directory
+            - name: public/build/target.maven.zip
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/target.maven.zip
+              type: file
+            - name: public/build/geckoview-androidTest.apk
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview/outputs/apk/androidTest/officialWithGeckoBinariesNoMinApi/debug/geckoview-official-withGeckoBinaries-noMinApi-debug-androidTest.apk
+              type: file
+            - name: public/build/geckoview_example.apk
+              path: /builds/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/geckoview_example/outputs/apk/officialWithGeckoBinariesNoMinApi/debug/geckoview_example-official-withGeckoBinaries-noMinApi-debug.apk
+              type: file
+            - name: public/build
+              path: /builds/worker/artifacts/
+              type: directory
+    run:
+        using: mozharness
+        actions: [get-secrets build multi-l10n update]
+        config:
+            - builds/releng_base_android_64_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        custom-build-variant-cfg: x86_64
+        tooltool-downloads: internal
+    toolchains:
+        - android-gradle-dependencies
+        - android-ndk-linux
+        - android-sdk-linux
+        - linux64-clang
+        - linux64-rust-android
+        - linux64-rust-size
+        - linux64-sccache
+        - linux64-cbindgen
+        - linux64-node

--- a/taskcluster/taskgraph/transforms/beetmover.py
+++ b/taskcluster/taskgraph/transforms/beetmover.py
@@ -73,32 +73,36 @@ from voluptuous import Any, Required, Op
 
 
 # Until bug 1331141 is fixed, if you are adding any new artifacts here that
 # need to be transfered to S3, please be aware you also need to follow-up
 # with a beetmover patch in https://github.com/mozilla-releng/beetmoverscript/.
 # See example in bug 1348286
 UPSTREAM_ARTIFACT_UNSIGNED_PATHS = {
     'android-x86-nightly': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_EN_US,
+    'android-x86_64-nightly': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_EN_US,
     'android-aarch64-nightly': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_EN_US,
     'android-api-16-nightly': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_EN_US,
     'android-x86-nightly-multi': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_MULTI,
+    'android-x86_64-nightly-multi': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_MULTI,
     'android-aarch64-nightly-multi': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_MULTI,
     'android-api-16-nightly-l10n': [],
     'android-api-16-nightly-multi': _MOBILE_UPSTREAM_ARTIFACTS_UNSIGNED_MULTI,
 }
 # Until bug 1331141 is fixed, if you are adding any new artifacts here that
 # need to be transfered to S3, please be aware you also need to follow-up
 # with a beetmover patch in https://github.com/mozilla-releng/beetmoverscript/.
 # See example in bug 1348286
 UPSTREAM_ARTIFACT_SIGNED_PATHS = {
     'android-x86-nightly': ["en-US/target.apk"],
+    'android-x86_64-nightly': ["en-US/target.apk"],
     'android-aarch64-nightly': ["en-US/target.apk"],
     'android-api-16-nightly': ["en-US/target.apk"],
     'android-x86-nightly-multi': ["target.apk"],
+    'android-x86_64-nightly-multi': ["target.apk"],
     'android-aarch64-nightly-multi': ["target.apk"],
     'android-api-16-nightly-l10n': ["target.apk"],
     'android-api-16-nightly-multi': ["target.apk"],
 }
 # Until bug 1331141 is fixed, if you are adding any new artifacts here that
 # need to be transfered to S3, please be aware you also need to follow-up
 # with a beetmover patch in https://github.com/mozilla-releng/beetmoverscript/.
 # See example in bug 1348286

--- a/taskcluster/taskgraph/transforms/beetmover_geckoview.py
+++ b/taskcluster/taskgraph/transforms/beetmover_geckoview.py
@@ -17,16 +17,17 @@ from taskgraph.util.scriptworker import 
 from taskgraph.transforms.task import task_description_schema
 from voluptuous import Required, Optional
 
 
 _ARTIFACT_ID_PER_PLATFORM = {
     'android-aarch64': 'geckoview{update_channel}-arm64-v8a',
     'android-api-16': 'geckoview{update_channel}-armeabi-v7a',
     'android-x86': 'geckoview{update_channel}-x86',
+    'android-x86_64': 'geckoview{update_channel}-x86_64',
 }
 
 _MOZ_UPDATE_CHANNEL_PER_BRANCH = {
     'mozilla-release': '',
     'mozilla-beta': '-beta',
     'mozilla-central': '-nightly',
     'try': '-nightly-try',
     'maple': '-nightly-maple',