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embedded content blocked, iframe error, Firefox site permission

Learn why Firefox may block a page embedded by another site, and what you can do to open it.

Some websites don’t allow their content to appear inside another website. If a site tries to embed a page that blocks this, Firefox will show an error that it cannot open the page: {warning}'''“To protect your security, ''[website]'' will not allow Firefox to display the page if another site has embedded it.”'''{/warning} This is a security feature on the website being embedded. It prevents [https://en.wikipedia.org/wiki/Clickjacking clickjacking], where a site tries to load another site without permission, often to trick users into clicking something they didn’t intend. This error is not caused by Firefox. It’s a choice made by the website owner. =Why does this happen?= Websites can control how their content is used. They may block it from being shown inside another site using special security settings like: *[https://developer.mozilla.org/docs/Web/HTTP/Headers/X-Frame-Options X-Frame options headers] *[https://developer.mozilla.org/docs/Web/HTTP/CSP Content security policy rules] These settings are common for banking sites, schools, government services, and others that need tight security. =What can I do?= You can still view the blocked content by opening it directly. ==On desktop== #Right-click the link or embedded area. #Select {button Open Link in New Tab} or {button Open Link in New Window}. #If you can’t right-click, try copying the link (long-press on Mac trackpads) and pasting it into a new tab. {note}'''Tip:''' You can also drag the link into a new tab if using Firefox on desktop.{/note} ==On mobile (phone or tablet)== #Tap and hold the link or embedded area (where the content should appear). #Choose {button Open in New Tab} from the menu. #If that doesn’t work, try copying the link (if visible) and pasting it into a new tab manually. {warning}'''Warning:''' On mobile, this may be harder to do if the embedded content doesn’t show clearly. Look for a blank or grey box on the page.{/warning} =What if I need to use the original page?= Sometimes the website that’s embedding the content depends on that embedded page to work properly (for example, a school login system or internal portal). If that’s the case: *Try opening the embedded page directly (as described above). *If that doesn’t help, you may need to contact the site owner and explain the issue. =Need help understanding this error?= If you're unsure what the page is trying to load or can’t figure out where to click: *Look for a blank box or missing content; that’s likely where the blocked page should appear. *If you're on mobile, try rotating your device or zooming out to better view hidden content. *Still stuck? Copy the page link and share it with your IT support, teacher, or website admin. =Related articles= *[[Firefox is stuck in Troubleshoot Mode]] *[[Websites look wrong or appear differently than they should]] *[[Site Permissions panel]]