Is Athean Copilot safe on LinkedIn in 2026?

No — LinkedIn detects Athean Copilot (we checked it November 11, 2026). Athean Copilot's extension ID is on LinkedIn's AED detection list (Nov 2026 snapshot), and LinkedIn's page code checks for Athean Copilot on every visit by requesting chrome-extension://ahomgjfionfmfihbemfknafbnhkpklbd/sidebar.html — a file that exists only if Athean Copilot is installed. We traced one code path by hand: Athean Copilot reads LinkedIn's li_at session cookie and sends its value in a request to the vendor's server.

Updated November 11, 2026 · LinkedIn AED snapshot Nov 2026

ID: ahomgjfionfmfihbemfknafbnhkpklbd

Does LinkedIn detect Athean Copilot? What we found in its code

Detected by LinkedIn

This browser extension is actively compiled into LinkedIn's frontend detection lists. LinkedIn's scripts can detect when this is active on your browser.

LinkedIn requests: chrome-extension://ahomgjfionfmfihbemfknafbnhkpklbd/sidebar.html

DETECTED

What this means: detection isn't an instant ban — it's one input to LinkedIn's risk score. But it's a standing signal: it stacks with your behavior (volume, programmatic clicks) and device fingerprint, and this is just the AED list — one of LinkedIn's three detection systems (see how it works).

What our automated scan found in Athean Copilot's code

We downloaded Athean Copilot version 1.0.52 from the Chrome Web Store on November 2, 2026 and searched its 8 code files for the patterns below. Each line shows the first place we found it.

Manual review (v1.0.52): We traced one code path by hand: Athean Copilot reads LinkedIn's li_at session cookie and sends its value in a request to the vendor's server. Code: sidebar.js:40 · sidebar.js:40 · sidebar.js:40

Athean Copilot's code references li_at — LinkedIn's session cookie, the one that keeps you logged in. 2 matches in 1 file — first at sidebar.js:40.
Athean Copilot uses the Chrome cookies API (chrome.cookies), which reads cookies of every site it has access to. 7 matches in 2 files — first at background.js:1.
Athean Copilot creates synthetic clicks or keystrokes (dispatchEvent / MouseEvent) — LinkedIn can tell these from real input (isTrusted=false). 85 matches in 4 files — first at content.js:2.
Athean Copilot runs code built at runtime (eval / new Function). 4 matches in 2 files — first at gmailContent.js:3204.
Athean Copilot makes its own network requests (fetch / XHR / WebSocket). 37 matches in 4 files — first at background.js:1.
Athean Copilot's code mentions linkedin.com. 13 matches in 3 files — first at content.js:125.

Permissions Athean Copilot asks for

alarmsstoragescriptingoffscreentabsactiveTabcookiesdeclarativeNetRequest*://*.linkedin.com/*https://app.athean.com/*http://localhost/*http://localhost:5173/*https://mail.google.com/*

What this scan is — and isn't. It is an automated static search of the shipped package, not a full teardown: a match means the pattern is in the code, not that Athean Copilot misuses it, and no match doesn't prove absence (minified or runtime-built code can hide it). We haven't traced where Athean Copilot sends data beyond the path above. How we test

How LinkedIn checks for Athean Copilot: the AED probe

That verdict isn't a guess. This is what LinkedIn's own page code does on every visit — simplified from its production bundle, which the BrowserGate investigation reverse-engineered line by line:

// LinkedIn's page bundle — simplified from BrowserGate's teardown

const hits = [];

for (const { id, file } of AED_LIST) // 4,934 ids incl. this one

try { await fetch("chrome-extension://" + id + "/" + file); hits.push(id); }

catch {} // not installed → silently swallowed

fireTrackingPayload("AedEvent", { browserExtensionIds: hits }); // → POST /li/track

// this extension is probed at:
// chrome-extension://ahomgjfionfmfihbemfknafbnhkpklbd/sidebar.html

On LinkedIn’s AED list

Yes

1 of 4,934 · snapshot Nov 2026

URL LinkedIn requests

chrome-extension://ahomgjfionfmfihbemfknafbnhkpklbd/sidebar.html

the extension's ID + a file bundled inside it

Store status

Live on the Web Store

Source

LinkedIn bundle

ℹVerify it yourself: on linkedin.com open DevTools → Sources and search the page bundle for ahomgjfionfm… or AedEvent; or Network → filter li/track to watch the verdict ship. The scan runs even in Incognito. Below — the full code-level teardown.

Athean Copilot — marketed on the Chrome Web Store, detected by LinkedIn — Vendor's own Chrome Web Store screenshot — this extension is on LinkedIn's detection list.

How LinkedIn fingerprints your browser while you use Athean Copilot

Even after a cookie is copied out, LinkedIn keeps one more receipt on every request that follows — a 48-point snapshot of the exact machine making it. Faking it convincingly means reproducing that machine's quirks, not just editing a string.

Click any signal above for what it means. These are illustrative values — this demo never reads your actual device.

Your 48-point fingerprint — RSA-encrypted, attached to every API call in this session, not just login

This extension runs inside your real browser, so its requests always carry your real fingerprint — that isn't something it controls, it's simply where its code executes.

Verified against LinkedIn source-code, Nov 2026 snapshot.Read full study