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Since Firefox 79 beta my college website doesn't work (embedded content)

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Dimas
Dimas
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Hi, Since I've updated to Firefox 79 beta I can't access my university campus website. It worked until Firefox 78 and it works with latest Chrome and Edge, but not in Firefox 79 beta and nightly.

The error is: "Website will not allow Firefox to display the page if another site has embedded it": https://support.mozilla.org/ca/kb/xframe-neterror-page?as=u&utm_source=inproduct

Is it a bug or a "feature"? UOC is one of the biggest online university of Spain, it will be a "disaster" if students can't access it with Firefox.

I can explain you how to reproduce it because it's the private area and you need student credentials to enter, but the login website is: http://cv.uoc.edu

In the console I can see some errors like this: Cookie “example” will be soon treated as cross-site cookie against “http://cv.uoc.edu/rb/inici/plin/fonts/icons.woff?cc152853f8bb07259fb3eb89b6fbfee7” because the scheme does not match.

Hi, Since I've updated to Firefox 79 beta I can't access my university campus website. It worked until Firefox 78 and it works with latest Chrome and Edge, but not in Firefox 79 beta and nightly. The error is: "Website will not allow Firefox to display the page if another site has embedded it": https://support.mozilla.org/ca/kb/xframe-neterror-page?as=u&utm_source=inproduct Is it a bug or a "feature"? UOC is one of the biggest online university of Spain, it will be a "disaster" if students can't access it with Firefox. I can explain you how to reproduce it because it's the private area and you need student credentials to enter, but the login website is: http://cv.uoc.edu In the console I can see some errors like this: Cookie “example” will be soon treated as cross-site cookie against “http://cv.uoc.edu/rb/inici/plin/fonts/icons.woff?cc152853f8bb07259fb3eb89b6fbfee7” because the scheme does not match.

All Replies (4)

Roland Tanglao
Roland Tanglao
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Hi Dimas:

Does cv.uoc.edu work if you use the latest general availability version i.e. Firefox 78.0.2 instead of Firefox 79 beta?

Cheers!

..Roland

cor-el
cor-el
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  • Top 10 Contributor
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A possible workaround you can try is to use the right-click context menu on the page:

  • This Frame -> "Show Only This Frame" or "Open Frame in New Tab"
Dimas
Dimas Úinéir na ceiste
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Roland Tanglao said
Hi Dimas: Does cv.uoc.edu work if you use the latest general availability version i.e. Firefox 78.0.2 instead of Firefox 79 beta? Cheers! ..Roland

No, with Firefox 78 I never seen this error. Now with 79 it seems to be random, I will try to investigate the casuistic.

cor-el
cor-el
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Note that this happens if this web page wants to open an external page in an iframe and that website prohibits this via a X-FRAME-OPTIONS header in the HTTP response headers.

You can check the HTTP response headers via the Web Console for the X-FRAME-OPTIONS header. If this worked before then the website that is embedded may have recently added this header for security reasons.