This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Denne tråden ble arkivert. Still et nytt spørsmål dersom du trenger hjelp.

Is there a way to ignore Cross-Origin Request Blocked?

Sourav
Sourav
more options

Hi, I am learning web development. I am into AJAX now. When I try to use `load('ajax/somedata.txt')` in a local HTML file, I get the error:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at file:///home/sourav/The%20Complete%20Web%20Development%20Course/JQuery/ajax/somedata.txt. (Reason: CORS request not http).

Same happens with other browsers. But Falkon browser is an exception. The other way to fix this is running an http server (like WEBrick).

Just because Firefox is my favourite browser, I want to load up the file correctly in Firefox. Is there a way to do that without running a local HTTP server?

Hi, I am learning web development. I am into AJAX now. When I try to use `load('ajax/somedata.txt')` in a local HTML file, I get the error: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at file:///home/sourav/The%20Complete%20Web%20Development%20Course/JQuery/ajax/somedata.txt. (Reason: CORS request not http). Same happens with other browsers. But Falkon browser is an exception. The other way to fix this is running an http server (like WEBrick). Just because Firefox is my favourite browser, I want to load up the file correctly in Firefox. Is there a way to do that without running a local HTTP server?

Endret av Sourav

All Replies (2)

Rich B
Rich B
more options

This link might have information for you.

https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSRequestNotHttp

There might not be a workaround.

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

Rich B said

This link might have information for you. https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSRequestNotHttp There might not be a workaround.

Actually, the article mentions the preference you can use to roll back the patch, but to use that, you may need to know the steps to change a preference.

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk.

(2) In the search box above the list, type or paste uniq and pause while the list is filtered

(3) Double-click the privacy.file_unique_origin preference to switch the value from true to false

To mitigate the vulnerability this patch addressed:

Save pages from untrusted sites in a completely separate folder, e.g., Downloads\Untrusted. That would make it difficult for an attacker to find any valuable content using local file links.