mrrlens
Sign in
Chrome extensionwhat they say

Allow CORS

Allow CORS: Access-Control-Allow-Origin

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

★★★★☆3.6 (298) · 800k+ users
Free
Chrome Web Store ↗
what mrrlens sees
MRR · No price listedNo price in the listing
Opportunity—
Buyer threads · 30 d0
“malware adds on the publisher website.”
#1 complaint · Bugs/Reliability · 80% of complaints read · analysed Oct 29, 2026 · source

01Revenue

No price in the listing

Store data from the Chrome Web Store listing, refreshed daily. Updated 9 h ago.

02Why users leave Allow CORS

Bugs/Reliability4 reviews · 80%

Extension fails on localhost:3000 CORS debugging, is reported not working, and publisher site reportedly shows malware ads.

“malware adds on the publisher website.” source ↗
1 more complaint, with verbatim quotesIncluded in the day pass and Pro.
Unlock

Sample: 5 recent complaints (1–3★ reviews) · clustered Oct 29, 2026 · complaints from Oct 2025–Aug 2026, almost all in the last 24 months · each review labelled by a model, quotes verbatim

03How to build a better Allow CORS

Build difficultyLowSimple browser extension; main work is reliable localhost CORS handling and Chrome Web Store review, no payments or data moat.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
Unlock

04Who wants a better Allow CORS

0 buyer threads in the last 30 days name Allow CORS, and 10 more are in the same market.

05Questions about Allow CORS

How much revenue does Allow CORS make?

Allow CORS's listing publishes no price and no paid plan, so MRRLens shows no revenue estimate. It may still charge on its own website; a founder can verify the real figure.

What do users complain about most in Allow CORS?

Across 5 recent complaints, the most common is bugs/reliability (80%). Extension fails on localhost:3000 CORS debugging, is reported not working, and publisher site reportedly shows malware ads.

What are the best Allow CORS alternatives?

The closest alternatives MRRLens found are CORS Unblock, Mod Header and ModHeader V3. The full list, with why users leave, is on the Allow CORS alternatives page.

How many people use Allow CORS?

Allow CORS lists 800k+ users on the Chrome Web Store, rated 3.6 (298).

See the full x-ray of Allow CORS

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.