diff --git a/.github/workflows/check-shell-validation.yml b/.github/workflows/check-shell-validation.yml
new file mode 100644
index 0000000..3f80b24
--- /dev/null
+++ b/.github/workflows/check-shell-validation.yml
@@ -0,0 +1,19 @@
+name: "[Check] Shell validation"
+
+on:
+  pull_request:
+    paths:
+      - "**.sh"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: shellcheck
+        run: ./scripts/shellcheck.sh
diff --git a/.github/workflows/check_releases.yml b/.github/workflows/check_releases.yml
index 6f79b7a..096bef8 100644
--- a/.github/workflows/check_releases.yml
+++ b/.github/workflows/check_releases.yml
@@ -14,6 +14,15 @@ jobs:
       - uses: actions/setup-python@v5
       - run: python check_releases.py
 
+  releases-json-integrity-check:
+    name: releases.json integrity check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Check releases.json files changes
+        run: ./scripts/run-releases-json-for-all-devices.sh
+
   releases-revision-checks:
     name: Check firmware releases revisions
     runs-on: ubuntu-latest
diff --git a/firmware/1/releases.json b/firmware/1/releases.json
index eac4267..f772af3 100644
--- a/firmware/1/releases.json
+++ b/firmware/1/releases.json
@@ -444,122 +444,5 @@
         "firmware_revision": "36b9d80120348700264bba518a533d4f82d79cbd",
         "changelog": "* Enable advanced transactions such as ones with REPLACE-BY-FEE and CHECKLOCKTIMEVERIFY\n* Fix message signing for altcoins\n* Message verification now shows address\n* Enable GPG signing support\n* Enable Ed25519 curve (for SSH and GPG)\n* Use separate deterministic hierarchy for NIST256P1 and Ed25519 curves\n* Users using SSH already need to regenerate their keys using the new firmware!!!",
         "notes": "https://blog.trezor.io/trezor-firmware-1-3-6-20a7df6e692"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 5],
-        "min_bridge_version": [1, 1, 2],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.5.bin",
-        "fingerprint": "7d5d2c7defb93081a7fb7a2d1e57677fbac2a3e3e50f22fa3ff83ec4ddaafd9d",
-        "firmware_revision": "7675a0aa5ff6e82f300c50df13a71ff0b81f9b44",
-        "changelog": "* Double size font for recovery words during the device setup\n* Optimizations for simultaneous access when more applications try communicate with the device",
-        "notes": "https://blog.trezor.io/trezor-firmware-1-3-5-allows-for-multisession-operation-cc4c25197855"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 4],
-        "min_bridge_version": [1, 1, 2],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.4.bin",
-        "fingerprint": "49e044eec84a9c210a09319d27a3ab8ba889ddeaa4d68f99d163f65267fce134",
-        "firmware_revision": "db93a50f76204418a2cf7d2c7e0391f486729bf3",
-        "changelog": "* Screensaver active on ClearSession message\n* Support for NIST P-256 curve\n* Updated SignIdentity to v2 format\n* Show seconds counter during PIN lockdown\n* Updated maxfee per kb for coins",
-        "notes": "https://blog.trezor.io/trezor-firmware-1-3-4-enables-ssh-login-86a622d7e609"
-    },
-    {
-        "required": true,
-        "version": [1, 3, 3],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.3.bin",
-        "fingerprint": "7fcee4c0459c22109f3fcfe0040148e9be6d30947f7fffb76c66cc500681257c",
-        "firmware_revision": "0cc270e6df3eca352eb8c72b602b7d5a0633b086",
-        "changelog": "* Ask for PIN on GetAddress and GetPublicKey\n* Signing speed improved",
-        "notes": "http://satoshilabs.com/old/news/2015-04-07-trezor-firmware-1-3-3-connect-api/"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 2],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.2.bin",
-        "fingerprint": "180656fbf94e43e0092eaf22c30ab3451a547b4213119bd62763dc97b94ad0d0",
-        "firmware_revision": "9761dd23e0cd28d7a98ce331e1676f7466336b7d",
-        "changelog": "* Fix check during transaction streaming\n* Login feature via SignIdentity message\n* GetAddress for multisig shows M of N description\n* PIN checking in constant time",
-        "notes": ""
-    },
-    {
-        "required": false,
-        "version": [1, 3, 1],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.1.bin",
-        "fingerprint": "8030e257fc4c75a8f4a0325f8ea37428dd8fc68a5f9ec5f8e2d1a0de328860cc",
-        "firmware_revision": "f2f50aa1886429aaeab5aa88e8c6e106ac5224b1",
-        "changelog": "* Optimized signing speed\n* Enabled OP_RETURN\n* Added option to change home screen\n* Moved fee calculation before any signing\n* Made PIN delay increase immune against hardware hacking",
-        "notes": "http://satoshilabs.com/old/news/2015-02-18-trezor-firmware-1-3-1-smart-property-notary-service-customized-home-screen/"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.3.0.bin",
-        "fingerprint": "1d417e1e99a4880f7e03b991cf318eebe7b6cb453d2f55b8112adc5fd1a8293c",
-        "firmware_revision": "b5eecb30be7712855cfa76fe671ef0b2e98e4aa9",
-        "changelog": "* Added multisig support\n* Added visual validation of receiving address\n* Added ECIES encryption capabilities",
-        "notes": "http://satoshilabs.com/old/news/2015-01-13-trezor-firmware-1-3-0-update-multisig/"
-    },
-    {
-        "required": true,
-        "version": [1, 2, 1],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.2.1.bin",
-        "fingerprint": "0f8685ee46632162b549eb22b99a1e4e013d6796ae536ea6acb877a491f564f6",
-        "firmware_revision": "524f2a957afb66e6a869384aceaca1cb7f9cba60",
-        "changelog": "* Added stack overflow protection\n* Added compatibility with Trezor Bridge",
-        "notes": "http://satoshilabs.com/old/news/2014-08-01-trezor-firmware-1-2-1-released/"
-    },
-    {
-        "required": false,
-        "version": [1, 2, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.2.0.bin",
-        "fingerprint": "0eec6fd320730acfa40963f0f470a47109378663907cc78b9c5797c19938c873",
-        "firmware_revision": "df524b9f35fd5cdba14eaa2bf2d948e3dc75254a",
-        "changelog": "* Fix false positives for fee warning\n* Better UI for signing/verifying messages\n* Smaller firmware size"
-    },
-    {
-        "required": false,
-        "version": [1, 1, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.1.0.bin",
-        "fingerprint": "a1709ead62659851933830f494cf9aa40047d1f098955aa93bd483b92df88c8e",
-        "firmware_revision": "272e10152ffc85c4f4114ed0762aeae45e97cd8e",
-        "changelog": "* Minor UI fixes\n* Better handling of unexpected messages\n* Added AES support"
-    },
-    {
-        "required": true,
-        "version": [1, 0, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/1/trezor-1.0.0.bin",
-        "fingerprint": "79371ee2ed2db8489aa4a5bce6907c24afc6de47e9658fef4cc12e2d902d9c51",
-        "firmware_revision": "0d0a1ab5f2987a926c7a717b93a2a3e59bf3344b",
-        "changelog": "* Added support for streaming of transactions into the device\n* Removed all current limits on size of signed transaction"
     }
 ]
diff --git a/firmware/t1b1/releases.json b/firmware/t1b1/releases.json
index 7e43a27..5dac54a 100644
--- a/firmware/t1b1/releases.json
+++ b/firmware/t1b1/releases.json
@@ -445,122 +445,5 @@
         "firmware_revision": "36b9d80120348700264bba518a533d4f82d79cbd",
         "changelog": "* Enable advanced transactions such as ones with REPLACE-BY-FEE and CHECKLOCKTIMEVERIFY\n* Fix message signing for altcoins\n* Message verification now shows address\n* Enable GPG signing support\n* Enable Ed25519 curve (for SSH and GPG)\n* Use separate deterministic hierarchy for NIST256P1 and Ed25519 curves\n* Users using SSH already need to regenerate their keys using the new firmware!!!",
         "notes": "https://blog.trezor.io/trezor-firmware-1-3-6-20a7df6e692"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 5],
-        "min_bridge_version": [1, 1, 2],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.5.bin",
-        "fingerprint": "7d5d2c7defb93081a7fb7a2d1e57677fbac2a3e3e50f22fa3ff83ec4ddaafd9d",
-        "firmware_revision": "7675a0aa5ff6e82f300c50df13a71ff0b81f9b44",
-        "changelog": "* Double size font for recovery words during the device setup\n* Optimizations for simultaneous access when more applications try communicate with the device",
-        "notes": "https://blog.trezor.io/trezor-firmware-1-3-5-allows-for-multisession-operation-cc4c25197855"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 4],
-        "min_bridge_version": [1, 1, 2],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.4.bin",
-        "fingerprint": "49e044eec84a9c210a09319d27a3ab8ba889ddeaa4d68f99d163f65267fce134",
-        "firmware_revision": "db93a50f76204418a2cf7d2c7e0391f486729bf3",
-        "changelog": "* Screensaver active on ClearSession message\n* Support for NIST P-256 curve\n* Updated SignIdentity to v2 format\n* Show seconds counter during PIN lockdown\n* Updated maxfee per kb for coins",
-        "notes": "https://blog.trezor.io/trezor-firmware-1-3-4-enables-ssh-login-86a622d7e609"
-    },
-    {
-        "required": true,
-        "version": [1, 3, 3],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.3.bin",
-        "fingerprint": "7fcee4c0459c22109f3fcfe0040148e9be6d30947f7fffb76c66cc500681257c",
-        "firmware_revision": "0cc270e6df3eca352eb8c72b602b7d5a0633b086",
-        "changelog": "* Ask for PIN on GetAddress and GetPublicKey\n* Signing speed improved",
-        "notes": "http://satoshilabs.com/old/news/2015-04-07-trezor-firmware-1-3-3-connect-api/"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 2],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.2.bin",
-        "fingerprint": "180656fbf94e43e0092eaf22c30ab3451a547b4213119bd62763dc97b94ad0d0",
-        "firmware_revision": "9761dd23e0cd28d7a98ce331e1676f7466336b7d",
-        "changelog": "* Fix check during transaction streaming\n* Login feature via SignIdentity message\n* GetAddress for multisig shows M of N description\n* PIN checking in constant time",
-        "notes": ""
-    },
-    {
-        "required": false,
-        "version": [1, 3, 1],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.1.bin",
-        "fingerprint": "8030e257fc4c75a8f4a0325f8ea37428dd8fc68a5f9ec5f8e2d1a0de328860cc",
-        "firmware_revision": "f2f50aa1886429aaeab5aa88e8c6e106ac5224b1",
-        "changelog": "* Optimized signing speed\n* Enabled OP_RETURN\n* Added option to change home screen\n* Moved fee calculation before any signing\n* Made PIN delay increase immune against hardware hacking",
-        "notes": "http://satoshilabs.com/old/news/2015-02-18-trezor-firmware-1-3-1-smart-property-notary-service-customized-home-screen/"
-    },
-    {
-        "required": false,
-        "version": [1, 3, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.3.0.bin",
-        "fingerprint": "1d417e1e99a4880f7e03b991cf318eebe7b6cb453d2f55b8112adc5fd1a8293c",
-        "firmware_revision": "b5eecb30be7712855cfa76fe671ef0b2e98e4aa9",
-        "changelog": "* Added multisig support\n* Added visual validation of receiving address\n* Added ECIES encryption capabilities",
-        "notes": "http://satoshilabs.com/old/news/2015-01-13-trezor-firmware-1-3-0-update-multisig/"
-    },
-    {
-        "required": true,
-        "version": [1, 2, 1],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.2.1.bin",
-        "fingerprint": "0f8685ee46632162b549eb22b99a1e4e013d6796ae536ea6acb877a491f564f6",
-        "firmware_revision": "524f2a957afb66e6a869384aceaca1cb7f9cba60",
-        "changelog": "* Added stack overflow protection\n* Added compatibility with Trezor Bridge",
-        "notes": "http://satoshilabs.com/old/news/2014-08-01-trezor-firmware-1-2-1-released/"
-    },
-    {
-        "required": false,
-        "version": [1, 2, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.2.0.bin",
-        "fingerprint": "0eec6fd320730acfa40963f0f470a47109378663907cc78b9c5797c19938c873",
-        "firmware_revision": "df524b9f35fd5cdba14eaa2bf2d948e3dc75254a",
-        "changelog": "* Fix false positives for fee warning\n* Better UI for signing/verifying messages\n* Smaller firmware size"
-    },
-    {
-        "required": false,
-        "version": [1, 1, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.1.0.bin",
-        "fingerprint": "a1709ead62659851933830f494cf9aa40047d1f098955aa93bd483b92df88c8e",
-        "firmware_revision": "272e10152ffc85c4f4114ed0762aeae45e97cd8e",
-        "changelog": "* Minor UI fixes\n* Better handling of unexpected messages\n* Added AES support"
-    },
-    {
-        "required": true,
-        "version": [1, 0, 0],
-        "min_bridge_version": [1, 1, 0],
-        "min_firmware_version": [1, 0, 0],
-        "min_bootloader_version": [1, 0, 0],
-        "url": "data/firmware/t1b1/trezor-t1b1-1.0.0.bin",
-        "fingerprint": "79371ee2ed2db8489aa4a5bce6907c24afc6de47e9658fef4cc12e2d902d9c51",
-        "firmware_revision": "0d0a1ab5f2987a926c7a717b93a2a3e59bf3344b",
-        "changelog": "* Added support for streaming of transactions into the device\n* Removed all current limits on size of signed transaction"
     }
 ]
diff --git a/scripts/check-firmware-presence-in-releases-json.sh b/scripts/check-firmware-presence-in-releases-json.sh
new file mode 100755
index 0000000..aafada5
--- /dev/null
+++ b/scripts/check-firmware-presence-in-releases-json.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+PARENT_PATH=$( cd "$(dirname "${BASH_SOURCE[0]}")" || exit ; pwd -P )
+
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+if [[ $# -ne 1 ]]
+    then
+        echo "must provide 1 argument. $# provided"
+        exit 1
+fi
+
+DEVICE=$1
+
+extract_file_paths_from_json() {
+  local json_file="$1"
+
+  # Filter out 'null' from missing .url_bitcoinonly for older firmwares
+
+  jq -r '.[] | select(.url) | .url, .url_bitcoinonly' "$json_file" | xargs -n1 --no-run-if-empty | sort | uniq \
+    | grep -vF "null"
+}
+
+list_files_in_directory() {
+  local dir="$1"
+  find "$dir" -type f -name "*.bin" -exec basename {} \; | sort \
+    | grep -v "trezor-inter-" | grep -v "trezor-t1tb-inter-" # Filter out Intermediary firmwares
+}
+
+compare_files() {
+  local json_file="$1"
+  local directory="$2"
+
+  # TEST 1: All files in releases.json exist
+
+  files_in_releases_json=$(extract_file_paths_from_json "$json_file")
+
+  all_exist=true
+  for file in $files_in_releases_json; do
+      file_to_test="$directory/../../../$file"
+      if [ ! -e "$file_to_test" ]; then
+          echo -e "${RED}File does not exist: $file_to_test${NC}"
+          all_exist=false
+      fi
+  done
+
+  if ! $all_exist ; then
+      exit 1
+  fi
+
+  # TEST 2: All files in directory are in releases.json
+
+  actual_files=$(list_files_in_directory "$directory") # All files in the directory
+  full_path_actual_files=$(for i in $actual_files; do echo "data/firmware/${DEVICE}/${i}"; done) # Prefixed to match the expected format in releases.json
+  extra_files=$(comm -13 <(echo "$files_in_releases_json") <(echo "$full_path_actual_files"))
+
+  if [[ -n "$extra_files" ]]; then
+    echo -e "${RED}Extra files in directory:"
+    echo "$extra_files" | awk '{print "    " $0}'
+    echo -e "${NC}"
+    exit 1
+  fi
+}
+
+json_file=$PARENT_PATH"/../firmware/"$DEVICE/"releases.json"
+directory=$PARENT_PATH"/../firmware/"$DEVICE
+
+echo "Checking directory: $directory"
+
+compare_files "$json_file" "$directory"
diff --git a/scripts/deploy-data.sh b/scripts/deploy-data.sh
index ced114d..60d05c2 100755
--- a/scripts/deploy-data.sh
+++ b/scripts/deploy-data.sh
@@ -6,11 +6,9 @@
 
 DIRS="bootloader bridge firmware legal registry udev suite connect security transparency misc"
 BUCKET=data.trezor.io
-ROLLBACK=rollback-data.trezor.io
 DISTRIBUTION_ID="E1ERY5K2OTKKI1"
 
-./check_releases.py
-if [ "$?" != "0" ]; then
+if ! ./check_releases.py; then
     echo "check_releases.py failed."
     exit
 fi
@@ -21,10 +19,10 @@ set -e
 # aws s3 sync s3://$BUCKET s3://$ROLLBACK
 
 for DIR in $DIRS; do
-    if [ "x$1" == "x-d" ]; then
-        aws s3 sync --delete --cache-control 'public, max-age=3600' $DIR s3://$BUCKET/$DIR
+    if [ "$1" == "-d" ]; then
+        aws s3 sync --delete --cache-control 'public, max-age=3600' "$DIR" s3://$BUCKET/"$DIR"
     else
-        aws s3 sync --cache-control 'public, max-age=3600' $DIR s3://$BUCKET/$DIR
+        aws s3 sync --cache-control 'public, max-age=3600' "$DIR" s3://$BUCKET/"$DIR"
     fi
 done
 
diff --git a/scripts/run-releases-json-for-all-devices.sh b/scripts/run-releases-json-for-all-devices.sh
new file mode 100755
index 0000000..b3f3ed5
--- /dev/null
+++ b/scripts/run-releases-json-for-all-devices.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+DEVICE_PATHS=$(find firmware -maxdepth 1 -type d ! -name 'translations' ! -name 'README.md' ! -name 'firmware')
+
+for FILE in $DEVICE_PATHS; 
+    do 
+        DEVICE_MODEL=$(basename "$FILE")
+        if ! ./scripts/check-firmware-presence-in-releases-json.sh "$DEVICE_MODEL" ; then
+            exit 1
+        fi;
+        
+        echo
+    done
diff --git a/scripts/shellcheck.sh b/scripts/shellcheck.sh
new file mode 100755
index 0000000..9254743
--- /dev/null
+++ b/scripts/shellcheck.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -e
+set -u
+set -x
+set -o pipefail
+
+shellcheck --version
+
+find . -type f -name '*.sh' -exec shellcheck {} +