--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -597,16 +597,56 @@ linux-shippable/opt:
             - linux64-binutils
             - linux64-clang
             - linux64-rust
             - linux64-rust-size
             - linux64-cbindgen
             - linux64-nasm
             - linux64-node
 
+linux-reproduced/opt:
+    description: "Linux32 Reproduced"
+    use-pgo: linux-shippable/opt
+    shipping-phase: build
+    shipping-product: firefox
+    index:
+        product: firefox
+        job-name: linux-reproduced-opt
+    treeherder:
+        platform: linux32-shippable/opt
+        symbol: Bpgo(repr)
+    # Limited to trunk until bug 1596350 is fixed.
+    run-on-projects: ['trunk', 'try']
+    worker-type: b-linux
+    worker:
+        docker-image: {in-tree: debian7-i386-build}
+        max-run-time: 9000
+        env:
+            PERFHERDER_EXTRA_OPTIONS: repr
+    run:
+        using: mozharness
+        actions: [get-secrets, build]
+        config:
+            - builds/releng_base_firefox.py
+            - builds/releng_base_linux_32_builds.py
+            - taskcluster_nightly.py
+        script: "mozharness/scripts/fx_desktop_build.py"
+        secrets: true
+        tooltool-downloads: public
+        need-xvfb: true
+    fetches:
+        toolchain:
+            - linux64-binutils
+            - linux64-clang
+            - linux64-rust
+            - linux64-rust-size
+            - linux64-cbindgen
+            - linux64-nasm
+            - linux64-node
+
 linux64-asan/opt:
     description: "Linux64 Opt ASAN"
     index:
         product: firefox
         job-name: linux64-asan-opt
     treeherder:
         platform: linux64/asan
         symbol: Bo

--- a/taskcluster/ci/diffoscope/kind.yml
+++ b/taskcluster/ci/diffoscope/kind.yml
@@ -57,16 +57,22 @@ jobs:
         # - There are some differences in PE metadata in helper.exe because
         #   it's (re)built in the EME build, and that part of the build is
         #   not reproducible.
         extra-args: >-
             --exclude-directory-metadata=recursive
             --exclude b/firefox/chrome/toolkit/content/global/buildconfig.html
             --exclude b/firefox/uninstall/helper.exe
 
+    reproducible-linux32:
+        symbol: Linux32
+        new: build-linux-reproduced/opt
+        original: build-linux-shippable/opt
+        fail-on-diff: true
+
 
 # Make a task for each diff we might want. The following are just examples,
 # Both original and new can point to builds from the full set of tasks or
 # from other sets through an index-search. Other kinds than `build` can be
 # compared (for example, static-analysis), provided you adjust the
 # kind-dependencies above.
 #     android-build-vs-previous-try:
 #         symbol: A