screenshotAllow CORS: Access-Control-Allow-origin  |  Download Easily add (Access-Control-Allow-Origin: *) rule to the response header.

Some of the important features of the Allow CORS: Access-Control-Allow-origin addon are listed below. This is followed by an overview of this addon. This summary contains few words about the addon, its function, and its features. Next is FAQ, this section is useful to get information about how this addon works in your browser. If you couldn't find a specific answer, please fill the bug report form on this page or the contact form on the homepage to let us know about your question. Following the FAQ, is the bug report form. It is designed to collect user feedbacks and bugs about this addon. Users can suggest improvements or feature requests through this form too. The next section is for submitting comments about this addon which uses the Facebook comments plugin. The last section is dedicated to reports submitted through the GitHub website. We hope the information provided on this page, could help you get all the basics you need about this addon and enable you to have a better experience with Allow CORS: Access-Control-Allow-origin.

In short, Allow CORS: Access-Control-Allow-origin is a lite addon that let you easily allow CORS when using cross-domain ajax request. Please check the YouTube tutorial below to get an idea of how this addon works in your browser. If you want to contribute to the developement of this addon, please fork it on GitHub, and push your changes to a named branch. Moreover, you can review all the comments made on GitHub commits.

4 Reasons to Use Allow CORS: Access-Control-Allow-Origin

  • Has toolbar popup with ON|OFF switch.

  • Toolbar button changes icon when the addon is active or inactive.

  • A lite addon with minimal RAM and CPU usage.

  • Available for Firefox, Chrome and Opera browsers on all operating systems.

YouTube Tutorial

This video gives you an idea of how the extension works in your browser.

Matched Content

Frequently Asked Questions

  • 1. What is Allow CORS: Access-Control-Allow-Origin addon?

    This addon lets you easily perform cross-domain ajax request in web applications. Simply activate the addon and perform the request. CORS or cross origin resource sharing is blocked (in javascript APIs) in modern browsers by default. Installing this addon will allow you to unblock this feature. Please note that, when the addon is added to your browser, it is inactive by default (toolbar icon is big grey C). If you want to activate the addon, please press on the toolbar icon once. The icon will turn to big orange C letter.

  • 2. What is CORS?

    As mentioned above, Cross Origin Resource Sharing or CORS is a policy that let the browser gain permission to access resources from a server on a different domain. Different domain means, a domain different than the top domain which the website is using. For example, if a page is in, and wants to make an image request from, this is called CORS request. Modern browser understand CORS policy and does not allow cross-origin resource sharing once the server requests that. When you have this addon active, CORS is always allowed for all websites, no matter what the server requests for.

  • 3. How can I download the source code for Allow CORS: Access-Control-Allow-Origin?

    To download the source code for this extension from Chrome Web Store, it is recommended to use Extension Source Downloader. With this addon, you can download the source code as a ZIP or CRX format to your machine. If you want to download the source code from the Firefox addons store, please open the firefox download link (if available) in the Firefox browser and then right-click on the - Add to Firefox - button and select - Save Link As... - item. Choose the destination folder on your machine and then save the file in XPI format. You can then rename the XPI format to a RAR or ZIP file. Some extensions may have a GitHub repo address, which you can use to download the source code as well. But, it may not be the latest version of the addon. Therefore, downloading the source code from the official web stores is the best option as it always gives you the latest version of the addon.

  • 4. Can I whitelist a website in this addon?

    No, unfortunately currently there is no way to whitelist a website for CORS permission. When the add-on is active, CORS is allowed in all websites.

  • 5. How can I turn the add-on ON or OFF?

    As mentioned above, simply click on the toolbar button once. When the icon is grey, the addon is disabled (OFF). Pressing on the toolbar icon again, will make the addon active (ON).

  • 6. Does this addon has any options or settings to adjust?

    No, this addon has no settings or options to adjust. Only a toggle button is available to turn the addon ON or OFF.

  • 7. Should I keep the addon active all the time?

    No, it is recommended to keep the addon inactive when you do not need it; and only activate the addon if you need for a certain website or request. As mentioned above, the addon is turned OFF when added to your browser for the first time. You need to click on the toolbar button once in order to activate the add-on.

  • 8. Where can I find the privacy policy for Allow CORS: Access-Control-Allow-Origin?

    Please read the privacy policy for this extension here.


Reporting Bugs

Your feedback goes a long way towards making this addon even better. With this feedback and bug report form, you can report bugs or suggest features/enhancements for the functionality or performance of this addon. Please note that this form will be sent to the developer(s) of this addon. You will not get an immediate or personal response at the moment. However, the developer(s) may contact you through the email address provided in this form for further clarifications or to request additional information regarding the reported bug(s).

If you want to rate or write a review for this addon in the official webstore, please press the - Rate this addon - button below.

Please enter the name of the extension (addon).

Please enter the current version of the extension.

Please be as specific as possible. Basically, describe what happened, what you were doing when it happened, and why you think it is a problem.

Describe the step-by-step process required to reproduce the issue you are reporting. Be specific when describing these steps by providing as much detail as possible.

Please try to leave a link to a screenshot for the specific bug or error report.

Please enter your operating system.

Please enter your browser and its current vesrion.

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Reviews | Discussions

Please note: keep these reviews/discussions clean, and avoid the usage of derogatory or inappropriate language or terminology in references to individuals or groups based on race, national or ethnic origin, color, religion, age, gender, etc. Do not submit bugs in your reviews, use the above bug-report section instead. Also, never post any personal information in these reviews.