diff --git a/aws-url-validator/.nvmrc b/aws-url-validator/.nvmrc
new file mode 100644
index 00000000..25cf32f6
--- /dev/null
+++ b/aws-url-validator/.nvmrc
@@ -0,0 +1 @@
+v12.16.1
\ No newline at end of file
diff --git a/aws-url-validator/.prettierignore b/aws-url-validator/.prettierignore
new file mode 100644
index 00000000..2e165aa6
--- /dev/null
+++ b/aws-url-validator/.prettierignore
@@ -0,0 +1,3 @@
+*node_modules*
+.git/
+package.json
diff --git a/aws-url-validator/.prettierrc b/aws-url-validator/.prettierrc
new file mode 100644
index 00000000..25677d6e
--- /dev/null
+++ b/aws-url-validator/.prettierrc
@@ -0,0 +1,10 @@
+{
+  "printWidth": 100,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "bracketSpacing": false,
+  "jsxBracketSameLine": false,
+  "semi": true,
+  "requirePragma": false,
+  "arrowParens": "avoid"
+}
\ No newline at end of file
diff --git a/aws-url-validator/README.md b/aws-url-validator/README.md
new file mode 100644
index 00000000..c8ff14ad
--- /dev/null
+++ b/aws-url-validator/README.md
@@ -0,0 +1,9 @@
+This is used for testing URLs that are opened in the browser after using the `OPEN_ALL` command. This is useful for validating if the URLs redirect or error after opening.
+
+The `lz4jsoncat` was build on macOS 10.15.7 on a 2013 Macbook Pro. If it doesn't work, rebuild it from [its repo](https://github.com/andikleen/lz4json).
+
+This requires:
+
+- Firefox
+- macOS 10.15.7 (or later?)
+- nvm
diff --git a/aws-url-validator/diff-urls-with-last-opened-urls-json.js b/aws-url-validator/diff-urls-with-last-opened-urls-json.js
new file mode 100755
index 00000000..3b7d0c9b
--- /dev/null
+++ b/aws-url-validator/diff-urls-with-last-opened-urls-json.js
@@ -0,0 +1,29 @@
+#!/usr/bin/env node
+const fs = require('fs');
+const assert = require('assert-diff');
+
+function main() {
+  const stdinBuffer = fs.readFileSync(0);
+  const rawSession = stdinBuffer.toString();
+  const session = JSON.parse(rawSession);
+  const activeAwsUrls = [];
+  session.windows.forEach(window => {
+    window.tabs.forEach(tab => {
+      const currentEntry = tab.entries[tab.entries.length - 1];
+      if (currentEntry.url.includes('console.aws.amazon.com')) {
+        activeAwsUrls.push(currentEntry.url);
+      }
+    });
+  });
+
+  const lastOpenedUrlsBuffer = fs.readFileSync(
+    // TODO this will break with Alfred 4
+    `${process.env.HOME}/Library/Caches/com.runningwithcrayons.Alfred-3/Workflow Data/com.ryankoval.awsconsoleservices/last-opened-urls.json`
+  );
+  const lastOpenedUrls = JSON.parse(lastOpenedUrlsBuffer);
+
+  assert.deepStrictEqual(activeAwsUrls, lastOpenedUrls);
+  console.log('✅ urls matches successfully!');
+}
+
+main();
diff --git a/aws-url-validator/getAwsUrlsFromPage.js b/aws-url-validator/getAwsUrlsFromPage.js
new file mode 100644
index 00000000..c8c427e7
--- /dev/null
+++ b/aws-url-validator/getAwsUrlsFromPage.js
@@ -0,0 +1,20 @@
+// this is a helper to paste in the browser to pull out urls from aws side nav
+function getAwsUrlsFromPage(className) {
+  return $$(`.${className} a`)
+    .map(element => {
+      let url;
+      try {
+        url = new URL(element.href);
+        url.searchParams.delete('region');
+        url = url.pathname + url.search + url.hash;
+      } catch {
+        url = element.href;
+      }
+      return {
+        id: element.innerText.replaceAll(' ', '').replaceAll('-', '').toLowerCase(),
+        name: element.innerText,
+        url,
+      };
+    })
+    .filter(entry => !!entry.id);
+}
diff --git a/aws-url-validator/lz4jsoncat b/aws-url-validator/lz4jsoncat
new file mode 100755
index 00000000..8b4fbbfb
Binary files /dev/null and b/aws-url-validator/lz4jsoncat differ
diff --git a/aws-url-validator/main.sh b/aws-url-validator/main.sh
new file mode 100755
index 00000000..3cd76a5e
--- /dev/null
+++ b/aws-url-validator/main.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+cd "$(dirname "$0")"
+
+# this holds session info in firefox like the currently opened tabs
+./lz4jsoncat $HOME/Library/Application\ Support/Firefox/Profiles/*default*/sessionstore-backups/recovery.jsonlz4 \
+  | ./diff-urls-with-last-opened-urls-json.js
diff --git a/aws-url-validator/package-lock.json b/aws-url-validator/package-lock.json
new file mode 100644
index 00000000..05eb0648
--- /dev/null
+++ b/aws-url-validator/package-lock.json
@@ -0,0 +1,123 @@
+{
+  "name": "aws-url-redirect-tester",
+  "requires": true,
+  "lockfileVersion": 1,
+  "dependencies": {
+    "ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "requires": {
+        "color-convert": "^2.0.1"
+      }
+    },
+    "assert-diff": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/assert-diff/-/assert-diff-3.0.2.tgz",
+      "integrity": "sha512-3FaXH0uQeMcFpVTcFjOsd6GQdiGgDoy7BYu/HEj/YZ+bjgZLC/i8nSIgerlUbY+iyoCKdEdjzYyNO9BUPcwUmA==",
+      "requires": {
+        "assert-plus": "1.0.0",
+        "json-diff": "0.5.4"
+      }
+    },
+    "assert-plus": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+    },
+    "chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+      "requires": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      }
+    },
+    "cli-color": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/cli-color/-/cli-color-0.1.7.tgz",
+      "integrity": "sha1-rcMgD6RxzCEbDaf1ZrcemLnWc0c=",
+      "requires": {
+        "es5-ext": "0.8.x"
+      }
+    },
+    "color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
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+      "requires": {
+        "color-name": "~1.1.4"
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+    "color-name": {
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+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
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+    },
+    "difflib": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/difflib/-/difflib-0.2.4.tgz",
+      "integrity": "sha1-teMDYabbAjF21WKJLbhZQKcY9H4=",
+      "requires": {
+        "heap": ">= 0.2.0"
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+    "dreamopt": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/dreamopt/-/dreamopt-0.6.0.tgz",
+      "integrity": "sha1-2BPM2sjTnYrVJndVFKE92mZNa0s=",
+      "requires": {
+        "wordwrap": ">=0.0.2"
+      }
+    },
+    "es5-ext": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.8.2.tgz",
+      "integrity": "sha1-q6jZ4ZQ6iVrJaDemKjmz9V7NlKs="
+    },
+    "has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
+    },
+    "heap": {
+      "version": "0.2.6",
+      "resolved": "https://registry.npmjs.org/heap/-/heap-0.2.6.tgz",
+      "integrity": "sha1-CH4fELBGky/IWU3Z5tN4r8nR5aw="
+    },
+    "json-diff": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/json-diff/-/json-diff-0.5.4.tgz",
+      "integrity": "sha512-q5Xmx9QXNOzOzIlMoYtLrLiu4Jl/Ce2bn0CNcv54PhyH89CI4GWlGVDye8ei2Ijt9R3U+vsWPsXpLUNob8bs8Q==",
+      "requires": {
+        "cli-color": "~0.1.6",
+        "difflib": "~0.2.1",
+        "dreamopt": "~0.6.0"
+      }
+    },
+    "prettier": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.3.2.tgz",
+      "integrity": "sha512-lnJzDfJ66zkMy58OL5/NY5zp70S7Nz6KqcKkXYzn2tMVrNxvbqaBpg7H3qHaLxCJ5lNMsGuM8+ohS7cZrthdLQ=="
+    },
+    "supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "requires": {
+        "has-flag": "^4.0.0"
+      }
+    },
+    "wordwrap": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus="
+    }
+  }
+}
diff --git a/aws-url-validator/package.json b/aws-url-validator/package.json
new file mode 100644
index 00000000..b9900cbf
--- /dev/null
+++ b/aws-url-validator/package.json
@@ -0,0 +1,9 @@
+{
+  "dependencies": {
+    "assert-diff": "^3.0.2",
+    "chalk": "^4.1.2",
+    "diff": "^5.0.0",
+    "prettier": "^2.3.2"
+  },
+  "devDependencies": {}
+}