diff --git a/.cron.yml b/.cron.yml
index 7236851f97e9..11ca9c0072cb 100644
--- a/.cron.yml
+++ b/.cron.yml
@@ -132,6 +132,7 @@ jobs:
           - mozilla-beta
           - mozilla-release
           - mozilla-esr102
+          - mozilla-esr115
           - elm
       # For all non m-c jobs we just run once daily matching the 10 UTC
       # nightly which is designed to align with searchfox's AWS cron
@@ -205,6 +206,7 @@ jobs:
           - mozilla-beta
           - mozilla-release
           - mozilla-esr102
+          - mozilla-esr115
       when:
           by-project:
               # No default branch
@@ -220,6 +222,7 @@ jobs:
               mozilla-esr102:
                   - {hour: 7, minute: 0}
                   - {hour: 19, minute: 0}
+              mozilla-esr115: []
 
     - name: periodic-update
       job:
@@ -231,6 +234,7 @@ jobs:
           - mozilla-beta
           - mozilla-release
           - mozilla-esr102
+          - mozilla-esr115
       when:
           - {weekday: 'Monday', hour: 8, minute: 0}
           - {weekday: 'Thursday', hour: 8, minute: 0}
diff --git a/python/mozbuild/mozbuild/artifacts.py b/python/mozbuild/mozbuild/artifacts.py
index f6f752e82aef..c748e6475c5c 100644
--- a/python/mozbuild/mozbuild/artifacts.py
+++ b/python/mozbuild/mozbuild/artifacts.py
@@ -101,6 +101,7 @@ class ArtifactJob(object):
     # The list below list should be updated when we have new ESRs.
     esr_candidate_trees = [
         "releases/mozilla-esr102",
+        "releases/mozilla-esr115",
     ]
     try_tree = "try"
 
diff --git a/taskcluster/ci/build/linux.yml b/taskcluster/ci/build/linux.yml
index 518fa5ef3daa..e34d5660a5d5 100644
--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -496,7 +496,11 @@ linux/opt:
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
-    run-on-projects: ['mozilla-beta', 'mozilla-release', 'mozilla-esr102']
+    run-on-projects:
+        - 'mozilla-beta'
+        - 'mozilla-release'
+        - 'mozilla-esr102'
+        - 'mozilla-esr115'
     use-sccache: true
     fetches:
         toolchain:
diff --git a/taskcluster/ci/build/windows-mingw.yml b/taskcluster/ci/build/windows-mingw.yml
index 91c00b7d5312..4927499e1fa6 100644
--- a/taskcluster/ci/build/windows-mingw.yml
+++ b/taskcluster/ci/build/windows-mingw.yml
@@ -32,7 +32,10 @@ win32-mingwclang/opt:
             - builds/releng_base_windows_32_mingw_builds.py
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang
-    run-on-projects: ['mozilla-central', 'mozilla-esr102']
+    run-on-projects:
+        - 'mozilla-central'
+        - 'mozilla-esr102'
+        - 'mozilla-esr115'
     use-sccache: true
     fetches:
         toolchain:
@@ -69,7 +72,10 @@ win32-mingwclang/debug:
             - builds/releng_base_windows_32_mingw_builds.py
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang-debug
-    run-on-projects: ['mozilla-central', 'mozilla-esr102']
+    run-on-projects:
+        - 'mozilla-central'
+        - 'mozilla-esr102'
+        - 'mozilla-esr115'
     use-sccache: true
     fetches:
         toolchain:
@@ -106,7 +112,10 @@ win64-mingwclang/opt:
             - builds/releng_base_windows_64_mingw_builds.py
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang
-    run-on-projects: ['mozilla-central', 'mozilla-esr102']
+    run-on-projects:
+        - 'mozilla-central'
+        - 'mozilla-esr102'
+        - 'mozilla-esr115'
     use-sccache: true
     fetches:
         toolchain:
@@ -143,7 +152,10 @@ win64-mingwclang/debug:
             - builds/releng_base_windows_64_mingw_builds.py
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang-debug
-    run-on-projects: ['mozilla-central', 'mozilla-esr102']
+    run-on-projects:
+        - 'mozilla-central'
+        - 'mozilla-esr102'
+        - 'mozilla-esr115'
     use-sccache: true
     fetches:
         toolchain:
diff --git a/taskcluster/ci/config.yml b/taskcluster/ci/config.yml
index 8202f31a1188..e7d4c65746d8 100644
--- a/taskcluster/ci/config.yml
+++ b/taskcluster/ci/config.yml
@@ -378,8 +378,8 @@ merge-automation:
             replacements: []
             merge-old-head: false
             end-tag: "FIREFOX_ESR_{major_version}_BASE"
-            to-repo: 'https://hg.mozilla.org/releases/mozilla-esr102'
-            to-branch: 'esr102'
+            to-repo: 'https://hg.mozilla.org/releases/mozilla-esr115'
+            to-branch: 'esr115'
         bump-central:
             fetch-version-from: "browser/config/version.txt"
             version-files:
@@ -413,6 +413,19 @@ merge-automation:
             merge-old-head: false
             to-repo: 'https://hg.mozilla.org/releases/mozilla-esr102'
             to-branch: 'esr102'
+        bump-esr115:
+            fetch-version-from: "browser/config/version.txt"
+            version-files:
+                - filename: "config/milestone.txt"
+                  version-bump: "minor"
+                - filename: "browser/config/version.txt"
+                  version-bump: "minor"
+                - filename: "browser/config/version_display.txt"
+                  version-bump: "minor"
+            replacements: []
+            merge-old-head: false
+            to-repo: 'https://hg.mozilla.org/releases/mozilla-esr115'
+            to-branch: 'esr115'
 
 scriptworker:
     # See additional configuration in taskcluster/gecko_taskgraph/util/scriptworker.py
diff --git a/taskcluster/ci/cron-bouncer-check/kind.yml b/taskcluster/ci/cron-bouncer-check/kind.yml
index c8db9eb27f16..a52291f97a8c 100644
--- a/taskcluster/ci/cron-bouncer-check/kind.yml
+++ b/taskcluster/ci/cron-bouncer-check/kind.yml
@@ -54,7 +54,7 @@ jobs:
                     mozilla-beta: LATEST_FIREFOX_RELEASED_DEVEL_VERSION
                     mozilla-release: LATEST_FIREFOX_VERSION
                     mozilla-esr102: FIREFOX_ESR
-                    # mozilla-esrXX: FIREFOX_ESR_NEXT
+                    mozilla-esr115: FIREFOX_ESR_NEXT
                     default: LATEST_FIREFOX_DEVEL_VERSION
             products-url: https://product-details.mozilla.org/1.0/firefox_versions.json
         treeherder:
diff --git a/taskcluster/ci/release-balrog-scheduling/kind.yml b/taskcluster/ci/release-balrog-scheduling/kind.yml
index 0ca6bfc12e00..2533818ca26c 100644
--- a/taskcluster/ci/release-balrog-scheduling/kind.yml
+++ b/taskcluster/ci/release-balrog-scheduling/kind.yml
@@ -35,12 +35,14 @@ jobs:
                             beta: [32]
                             release: [145]
                             esr102: [17770]
+                            esr115: [17824]
                             default: []
                     staging:
                         by-release-type:
                             beta: [32]
                             release: [145]
                             esr102: [902]
+                            esr115: [909]
                             default: []
             background-rate:
                 by-release-type:
diff --git a/taskcluster/ci/release-balrog-submit-toplevel/kind.yml b/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
index 555b75176c5c..758579679301 100644
--- a/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
+++ b/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
@@ -47,6 +47,7 @@ jobs:
                     beta: ["firefox-beta-cdntest", "firefox-beta-localtest"]
                     release(-rc)?: ["firefox-release-cdntest", "firefox-release-localtest"]
                     esr102: ["firefox-esr102-cdntest", "firefox-esr102-localtest"]
+                    esr115: ["firefox-esr115-cdntest", "firefox-esr115-localtest"]
                     default: []
             pin-channels:
                 by-release-type:
diff --git a/taskcluster/ci/release-bouncer-aliases/kind.yml b/taskcluster/ci/release-bouncer-aliases/kind.yml
index 36a41850af58..fa653ba5f389 100644
--- a/taskcluster/ci/release-bouncer-aliases/kind.yml
+++ b/taskcluster/ci/release-bouncer-aliases/kind.yml
@@ -73,8 +73,7 @@ jobs:
                     firefox-esr-msix-latest-ssl: msix
                     firefox-esr-pkg-latest-ssl: pkg
                     firefox-esr-langpack-latest-ssl: langpack
-                esrXXX:  # XXX - to update when we branch next ESR
-                    # ... these point to the newer branch
+                esr115:
                     firefox-esr-next-latest-ssl: installer-ssl
                     firefox-esr-next-latest: installer
                     firefox-esr-next-msi-latest-ssl: msi
diff --git a/taskcluster/ci/release-bouncer-sub/kind.yml b/taskcluster/ci/release-bouncer-sub/kind.yml
index abfd7e9a49ed..131b41b0a7b7 100644
--- a/taskcluster/ci/release-bouncer-sub/kind.yml
+++ b/taskcluster/ci/release-bouncer-sub/kind.yml
@@ -43,7 +43,7 @@ jobs:
         bouncer-products:
             by-release-type:
                 default: ['complete-mar', 'installer', 'installer-ssl', 'partial-mar', 'stub-installer', 'msi', 'msix', 'pkg', 'langpack']
-                esr102: ['complete-mar', 'installer', 'installer-ssl', 'partial-mar', 'msi', 'msix', 'pkg', 'langpack']
+                esr.*: ['complete-mar', 'installer', 'installer-ssl', 'partial-mar', 'msi', 'msix', 'pkg', 'langpack']
         shipping-product: firefox
         treeherder:
             platform: firefox-release/opt
diff --git a/taskcluster/ci/release-update-verify-config-next/kind.yml b/taskcluster/ci/release-update-verify-config-next/kind.yml
index a6dfd910f8c1..959d0afb9a68 100644
--- a/taskcluster/ci/release-update-verify-config-next/kind.yml
+++ b/taskcluster/ci/release-update-verify-config-next/kind.yml
@@ -13,7 +13,7 @@ transforms:
 job-defaults:
     name: update-verify-config-next
     run-on-projects: []  # to make sure this never runs as part of CI
-    run-on-releases: [esr102]
+    run-on-releases: [esr115]
     shipping-phase: promote
     worker-type: b-linux-gcp
     worker:
@@ -52,7 +52,7 @@ job-defaults:
         updater-platform: linux-x86_64
         product: firefox
         channel: "esr-localtest-next"
-        include-version: esr102-next
+        include-version: esr115-next
         last-watershed: "68.0esr"
 
 jobs:
diff --git a/taskcluster/ci/release-update-verify-config/kind.yml b/taskcluster/ci/release-update-verify-config/kind.yml
index b2964ac7bf5f..7a3403b32c47 100644
--- a/taskcluster/ci/release-update-verify-config/kind.yml
+++ b/taskcluster/ci/release-update-verify-config/kind.yml
@@ -54,6 +54,7 @@ job-defaults:
                 beta: "72.0"
                 release(-rc)?: "72.0.2"
                 esr102: "68.0esr"
+                esr115: "68.0esr"
                 default: "default"
 
 jobs:
diff --git a/taskcluster/ci/release-update-verify-next/kind.yml b/taskcluster/ci/release-update-verify-next/kind.yml
index 4c401314b580..ad72e9b118ae 100644
--- a/taskcluster/ci/release-update-verify-next/kind.yml
+++ b/taskcluster/ci/release-update-verify-next/kind.yml
@@ -20,7 +20,7 @@ transforms:
 job-defaults:
     name: update-verify-next
     run-on-projects: []  # to make sure this never runs as part of CI
-    run-on-releases: [esr102]
+    run-on-releases: [esr115]
     shipping-phase: promote
     worker-type: b-linux-gcp
     worker:
diff --git a/taskcluster/docs/parameters.rst b/taskcluster/docs/parameters.rst
index 2df1ac403237..562ed2c54f5d 100644
--- a/taskcluster/docs/parameters.rst
+++ b/taskcluster/docs/parameters.rst
@@ -192,7 +192,7 @@ Release Promotion
    Specify the next version for version bump tasks.
 
 ``release_type``
-   The type of release being promoted. One of "nightly", "beta", "esr102", "release-rc", or "release".
+   The type of release being promoted. One of "nightly", "beta", "esr102", "esr115", "release-rc", or "release".
 
 ``release_eta``
    The time and date when a release is scheduled to live. This value is passed to Balrog.
diff --git a/taskcluster/gecko_taskgraph/decision.py b/taskcluster/gecko_taskgraph/decision.py
index 570e58fd372c..184977048184 100644
--- a/taskcluster/gecko_taskgraph/decision.py
+++ b/taskcluster/gecko_taskgraph/decision.py
@@ -96,6 +96,10 @@ PER_PROJECT_PARAMETERS = {
         "target_tasks_method": "mozilla_esr102_tasks",
         "release_type": "esr102",
     },
+    "mozilla-esr115": {
+        "target_tasks_method": "mozilla_esr115_tasks",
+        "release_type": "esr115",
+    },
     "pine": {
         "target_tasks_method": "pine_tasks",
     },
diff --git a/taskcluster/gecko_taskgraph/target_tasks.py b/taskcluster/gecko_taskgraph/target_tasks.py
index 51caa9ef8343..b09d8bbfbf29 100644
--- a/taskcluster/gecko_taskgraph/target_tasks.py
+++ b/taskcluster/gecko_taskgraph/target_tasks.py
@@ -558,6 +558,30 @@ def target_tasks_mozilla_esr102(full_task_graph, parameters, graph_config):
     return [l for l, t in full_task_graph.tasks.items() if filter(t)]
 
 
+@_target_task("mozilla_esr115_tasks")
+def target_tasks_mozilla_esr115(full_task_graph, parameters, graph_config):
+    """Select the set of tasks required for a promotable beta or release build
+    of desktop, without android CI. The candidates build process involves a pipeline
+    of builds and signing, but does not include beetmover or balrog jobs."""
+
+    def filter(task):
+        if not filter_release_tasks(task, parameters):
+            return False
+
+        if not standard_filter(task, parameters):
+            return False
+
+        platform = task.attributes.get("build_platform")
+
+        # Android is not built on esr115.
+        if platform and "android" in platform:
+            return False
+
+        return True
+
+    return [l for l, t in full_task_graph.tasks.items() if filter(t)]
+
+
 @_target_task("promote_desktop")
 def target_tasks_promote_desktop(full_task_graph, parameters, graph_config):
     """Select the superset of tasks required to promote a beta or release build
@@ -1144,6 +1168,7 @@ def target_tasks_release_simulation(full_task_graph, parameters, graph_config):
         "beta": "mozilla-beta",
         "release": "mozilla-release",
         "esr102": "mozilla-esr102",
+        "esr115": "mozilla-esr115",
     }
     target_project = project_by_release.get(parameters["release_type"])
     if target_project is None:
diff --git a/taskcluster/gecko_taskgraph/transforms/update_verify_config.py b/taskcluster/gecko_taskgraph/transforms/update_verify_config.py
index ac42d4183d53..1de808f82ba1 100644
--- a/taskcluster/gecko_taskgraph/transforms/update_verify_config.py
+++ b/taskcluster/gecko_taskgraph/transforms/update_verify_config.py
@@ -28,7 +28,7 @@ INCLUDE_VERSION_REGEXES = {
     # Same as nonbeta, except for the esr suffix
     "esr": r"'^\d+\.\d+(\.\d+)?esr$'",
     # Previous esr versions, for update testing before we update users to esr102
-    "esr102-next": r"'^(52|60|68|78|91)+\.\d+(\.\d+)?esr$'",
+    "esr115-next": r"'^(52|60|68|78|91|102)+\.\d+(\.\d+)?esr$'",
 }
 
 MAR_CHANNEL_ID_OVERRIDE_REGEXES = {
diff --git a/taskcluster/gecko_taskgraph/util/attributes.py b/taskcluster/gecko_taskgraph/util/attributes.py
index 5e465b2a700f..0ab671e5128e 100644
--- a/taskcluster/gecko_taskgraph/util/attributes.py
+++ b/taskcluster/gecko_taskgraph/util/attributes.py
@@ -16,6 +16,7 @@ RELEASE_PROJECTS = {
     "mozilla-beta",
     "mozilla-release",
     "mozilla-esr102",
+    "mozilla-esr115",
     "comm-central",
     "comm-beta",
     "comm-esr102",
diff --git a/taskcluster/gecko_taskgraph/util/scriptworker.py b/taskcluster/gecko_taskgraph/util/scriptworker.py
index 9a5c44617215..f14ff12149f3 100644
--- a/taskcluster/gecko_taskgraph/util/scriptworker.py
+++ b/taskcluster/gecko_taskgraph/util/scriptworker.py
@@ -59,6 +59,7 @@ SIGNING_SCOPE_ALIAS_TO_PROJECT = [
             "mozilla-beta",
             "mozilla-release",
             "mozilla-esr102",
+            "mozilla-esr115",
             "comm-beta",
             "comm-esr102",
         },
@@ -104,6 +105,7 @@ BEETMOVER_SCOPE_ALIAS_TO_PROJECT = [
             "mozilla-beta",
             "mozilla-release",
             "mozilla-esr102",
+            "mozilla-esr115",
             "comm-beta",
             "comm-esr102",
         },
@@ -184,6 +186,12 @@ BALROG_SCOPE_ALIAS_TO_PROJECT = [
             "mozilla-esr102",
         },
     ],
+    [
+        "esr115",
+        {
+            "mozilla-esr115",
+        },
+    ],
 ]
 
 """Map the balrog scope aliases to the actual scopes.
@@ -194,6 +202,7 @@ BALROG_SERVER_SCOPES = {
     "beta": "balrog:server:beta",
     "release": "balrog:server:release",
     "esr102": "balrog:server:esr",
+    "esr115": "balrog:server:esr",
     "default": "balrog:server:dep",
 }
 
diff --git a/testing/web-platform/manifestdownload.py b/testing/web-platform/manifestdownload.py
index 6a34be858fcf..8f178061bb57 100644
--- a/testing/web-platform/manifestdownload.py
+++ b/testing/web-platform/manifestdownload.py
@@ -92,6 +92,7 @@ def taskcluster_url(logger, commits):
         "mozilla-central": "mozilla-central",
         "integration/autoland": "autoland",
         "releases/mozilla-esr102": "mozilla-esr102",
+        "releases/mozilla-esr115": "mozilla-esr115",
     }
     cset_url = (
         "https://hg.mozilla.org/{repo}/json-pushes?"