Allow CORS: Access-Control-Allow-Origin icon

Allow CORS: Access-Control-Allow-Origin

by Muyor

v0.2.1 Updated Sep 8, 2025 90.44KiB
CWS
800K
Users
★ 3.40
287 reviews
#57
of 33.5K
tools
#9 of 8.3K
⚠️Requests 1 sensitive permission

Description

Allow CORS: Access-Control-Allow-Origin lets you easily perform cross-domain Ajax requests in web applications. Simply activate the add-on and perform the request. CORS or Cross-Origin Resource Sharing is blocked in modern browsers by default (in JavaScript APIs). Installing this add-on will allow you to unblock this feature. Please note that, when the add-on is added to your browser, it is inactive by default (toolbar icon is grey C letter). If you want to activate the add-on, please open the toolbar popup and press the toggle button on the left side. The icon will turn to an orange C letter. If you have a feature request or found a bug to report, please fill out the bug report form on the add-on's homepage (https://mybrowseraddon.com/access-control-allow-origin.html).
Allow CORS: Access-Control-Allow-Origin screenshot 1Allow CORS: Access-Control-Allow-Origin screenshot 2Allow CORS: Access-Control-Allow-Origin screenshot 3

Reviews (96 cached)

★☆☆☆☆2026-02-06
Cateyes inDark

It doesn't work for me when I try to debug a web app on http://localhost:3000 using Chrome, which has CORS errors. But it seems to have some kind of effect on other normal websites. Another "Allow CORS" extension (https://chromewebstore.google.com/detail/allow-cors/nfommabkpincchfljfgedplbfimaipkn) I've installed does work in this case, so pretty sure this extension can be fixed for it. But this extension has some nice features, e.g., the whitelist etc.

★☆☆☆☆2025-10-10
Koopa Boy

keeps opening the update page every time i start the browser, stop opening new tabs and behave yourself like any other decent extension

★☆☆☆☆2024-10-10
Ankit kumar Yadav

what can i do that i have been blocked

★☆☆☆☆2024-10-06
lochan nimje

It says I am unable to use this as I am blocked to use Why have I been blocked? This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. What can I do to resolve this? You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. what to do in this scenario

★☆☆☆☆2024-09-18
Ian Serfaty

doesn't work

★☆☆☆☆2024-08-19
Marwa Steitieh

doesnt work at all

★☆☆☆☆2024-07-30
Darren Phipps

Nothing Clicking in app (Except the "Explore more app") Basically trash, sorry https://webvm.replit.app/ (VM Cloud launcher AKA a ripoff for copy.sh x86)

★☆☆☆☆2024-06-14
Mind your own Buisness

this says you are blocked and unable to acess the broswer please mail the site owner to unblock you

★☆☆☆☆2024-06-04
Bahul Tyagi

blocked by the site

★☆☆☆☆2024-05-11
omkar

I am not able to use the extension as it says i have been blocked by the site

★☆☆☆☆2024-04-08
Riaj Ikbal

i was creating and youtube clone and using external apis before using this extension my app was running fine but after using it my apis were blocked by youtube and my api keys were useless so i uninstall it

★☆☆☆☆2024-03-29
Ujan Dutta

i was blocked

★☆☆☆☆2024-01-30
piyush gupta

Hi Team, I am not able to use the extension as it says i have been blocked by the site. please help on that as i am not able to open the support site as well.

★☆☆☆☆2023-09-15
Luiz Eduardo Guida Valmont

doesn't work, i didn't see changes in how headers are submitted nor in the browser just enabling cros, plain and simple

★☆☆☆☆2023-08-19
Martin Dahlin

Didn't work. I installed it, then reloaded my local page (file://yadda yadda). CORS is still blocked. Tried the test page and I get: CORS is blocked for GET ✖ So either the extension doesn't work or it's too complicated to use. My steps: Install > Enable extension > Go to my page > Add to white list > Refresh and test > Go to test page ...so yeah, I'm giving up. If this thing is supposed to work then it needs better UX.

★☆☆☆☆2023-08-15
a

It broke my entire pc, cant use discord or basically any website

★☆☆☆☆2022-06-04
Spencer Bouse

Whitelist dont even kinda work

★☆☆☆☆2022-05-16
Hasan Redžović

You should have whitelist for domains where you want this feature to enabled, not other way around...

★☆☆☆☆2022-04-28
Alexander Druzhinin

doesn't work, even when turned ON. The Test CORS page used to test - CORS is blocked for any combination

★☆☆☆☆2022-03-28
PNam

not work

★☆☆☆☆2022-02-04
Alexander Armua

It didnt work

★☆☆☆☆2022-01-09
gustavo tedesco

its not work since 2019. 09/01/2022

★☆☆☆☆2021-11-19
Marc Muller

Not working, despite activating it as documentation suggests.

★☆☆☆☆2021-09-17
Vladut Constantin Stegariu

Has no effect. Just waste of time.

★☆☆☆☆2021-09-07
Trevor Devalle

Simply it doesn't work

★☆☆☆☆2021-08-11
Luiz Henrique Rios

Not working

★☆☆☆☆2021-08-03
Tim Rasim

Not working

★☆☆☆☆2021-06-19
Peter de Bruin-Trautmann

It doesn't work in the current Chrome version (91.0.4472.114).

★☆☆☆☆2021-05-01
bedoui wejdene

Avoid this app , it doesn't work

★☆☆☆☆2021-04-16
Sandy Huang

not working

★☆☆☆☆2021-04-08
WobbyChip

not working

★☆☆☆☆2021-03-16
arief iman santoso

doesn't work at all

★☆☆☆☆2021-03-07
Ahmed Salah

Doesn't work, will screw up your browser

★☆☆☆☆2021-01-29
Li Kailin

not working

★☆☆☆☆2021-01-09
S.M.K.H

This extension is using around 6 GB OF ram on my macbook pro, the developer must be using some kind of crypto script. If so this is illegal and fraud please take action.

★☆☆☆☆2020-11-26
Nick

Didn't work

★☆☆☆☆2020-11-17
Entusoft

Not work!

★☆☆☆☆2020-11-07
FURRYHUSKY1000

Doesn't seem to work at all.

★☆☆☆☆2020-10-28
Mike Knights

Marking this a zero so devs might fix this issue: Patch Requests are broken when this is turned on, this caused a really headache with MS devops! Could someone fix it and let me know.

★☆☆☆☆2020-09-06
Jannik Lohaus

Simply put: Does not work.

★☆☆☆☆2020-08-30
Amit Manasara

Not working while loading CSV file frol local storage for developing an HTML page

★☆☆☆☆2020-07-26
Ira Sanchez

clicking on the icon just bring up the context menu. extension does nothing.

★☆☆☆☆2020-07-08
Roman Melíšek

Absolutely doesn't work.

★☆☆☆☆2020-04-12
Arnav Biswas

"not working"

★☆☆☆☆2020-04-07
Sumedh Singh

Stupid Extension. Wasted 1 day of me and my colleague!

★☆☆☆☆2020-03-30
Denis U

doesn't work

★☆☆☆☆2020-03-25
Jay Inting

Doesn't work as of latest version.

★☆☆☆☆2020-03-19
el bilbil

don't work :/

★☆☆☆☆2020-03-10
Michaela Müller

It's not working for Chrome 80.0.3987.132 at Mac OS

★☆☆☆☆2020-03-01
Faisal Arshed

Not working for me on Chrome 80.0.3987.122

Permissions (3)

Permissions

declarativeNetRequest Can block or redirect network requests storage Can store data locally in your browser webRequest Can observe and analyze network traffic

Details

Version 0.2.1
Updated Sep 8, 2025
Size 90.44KiB
First Seen Mar 22, 2026