CORS Unblock

Name: CORS Unblock
Rating: 3.9091 (33 reviews)
Author: Balvin

No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled

CORS Unblock

Say goodbye to CORS errors! The CORS Unblock Firefox add-on allows seamless web requests by appending Access-Control-Allow-Origin headers. Control XMLHttpRequest and fetch methods effortlessly. Toggle the extension from the toolbar, customize allowed methods (e.g. GET, POST, DELETE), and choose whether to overwrite existing headers. Ideal for developers needing flexibility in handling CORS issues.

Features:

Easily append CORS headers to requests.
Control request methods using a user-friendly interface.
Toggle functionality directly from your toolbar.
Customize behavior via context menus.

Perfect for integrating with any web application without hitting CORS roadblocks!

Download

By: Balvin

Daily users: 7,058

-98

Rating: 3.91

(33)

Version: 0.3.8 (Last updated: 2024-02-11)

Version code: 5690645

Creation date: 2019-01-22

Weekly download count: 424

Firefox on Android: No

Risk:

Permissions:

storage
<all_urls>
webRequest
webRequestBlocking
declarativeNetRequest
contextMenus

Size: 211.30K

URLs: Website

Full description: See detailed description

Source: Firefox Browser Add-ons

Updated: 17 hours ago

Ranking

# 963 ▼ 3

Other rankings

#100 in Web Development ▲ 1

#209 in Privacy & Security ▼ 2

#10 in unblock keyword 52

#29 in block ads keyword 73

#36 in mock keyword 45

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Other platforms

CORS Unblock (v0.3.8)

100,000 4.19

(168)

CORS Unblock (v0.3.8)

58,400 4.30

(12)

User reviews

Pros

Works as intended for some users
Useful for frontend developers
Ability to modify "Access-Control-Expose-Headers"
Simple toggle interface to enable/disable

Cons

Many users report that it does not work
No whitelist option for specific sites
Could cause issues on certain websites
Inconsistent performance across different Firefox versions

Most mentioned

Does not work for many users
Requests for a whitelist feature
Generally effective when it works
Issues with YouTube playback

These summaries are automatically generated weekly using AI based on recent user reviews. User reviews may be inaccurate, spammy, or outdated.

User reviews

by 远离中共邪教快退出党团队, 2025-03-24

Un desastre...no funciona...como si no existiera..

by marcelito69, 2025-02-16

by 退出中共邪教党团队避疫, 2025-02-10

View all user reviews

Add-on safety

Risk impact

CORS Unblock requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

CORS Unblock has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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