Firefox: форум сообщества

Ordered some new checks from Costco as a "guest" since I haven't set up an online account (generally speaking, I wouldn't use, but to order checks, I need to do it online - not in the store). I put my full order together in the cart, went through the full process of completing the order and payment, but after submitting, I expected the order confirmation page. However, I received the notice that the Harland Clarke check printing vendor site won't allow firefox to display the page. Without that confirmation page, I don't have an order number to reference. The instructions provided says to embed the link (which link?) in another tab to open the missing page. I've also tried following all other instructions; going on the Mozilla/Firefox desktop/ trying to find a Mozilla contact phone number, etc. All that happens is that I go into a never-ending circle - which means no-where. What am I missing? This is what I get:

Fix error “Website will not allow Firefox to display the page.” 3–4 minutes

Firefox, Firefox for Android Firefox, Firefox for Android Last updated: 8/24/25 36% of users voted this helpful

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:

“To protect your security, [website] will not allow Firefox to display the page if another site has embedded it.”

This is a security feature on the website being embedded. It prevents 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:

   X-Frame options headers
   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 Open Link in New Tab or 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. 

Tip: You can also drag the link into a new tab if using Firefox on desktop. On mobile (phone or tablet)

   Tap and hold the link or embedded area (where the content should appear).
   Choose 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: On mobile, this may be harder to do if the embedded content doesn’t show clearly. Look for a blank or gray box on the page. 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 

These fine people helped write this article:

Latest version of Firefox on macOS, Mac Mini M2 - 8 GB RAM and MacBook Air M3 - 16 GB RAM: Firefox malfunctions on launch - I have to force quit and relaunch it - Firefox starts to load then freezes. Firefox works, then I launch other applications like Chrome, Thunderbird, etc. Firefox freezes on the M2 8GB RAM but rarely on the M3 16GB. A few weeks ago, these problems didn't exist on either of my Macs - since an automatic update that I didn't notice, it's now a consistent occurrence.

UNBELIEVABLE, I've never had this much trouble with a previous update. Your AUTOMATIC update closed all web pages that were open last session, offers no option to restore previous session, and took me 2 hours just to get bookmarks back. I had way too many pages open, but I have lost some important research for work that was in process. Multiple support options didn't work until I found one that would for bookmarks, but the history seems to be unretrievable. Not how i wanted to spend my morning.

I wanted to change my Paypal password. I went to their page, and generated a password, but didn't save it. So I went through the password reset process, and asked Firefox to generate another secure password. Paypal rejected it, because it was the one I used before. Every time I asked Firefox for another password, I got exactly the same one.

Is that intentional? How do I change it, so I get a different password when I ask for a new one?

Hi,

I use Firefox app in macos, android and ipados. The bookmarks across them are not synching automatically. I need to press sync manuelly to do. All apps are updated, all settings look fine. Please help me synch bookmarks across platforms. Thanks a lot.

I use Firefox on a Mac to access Brightspace for my classes. I also use Grammarly. When copying text from the Grammarly widgets and pasting it into the Brightspace HTML editor, the text is stripped of hard returns, causing paragraphs to collapse without any breaks between them.

I have tried pasting as unformatted text, and the issue persists. This issue does not occur in Chrome, so I suspect it is due to how Firefox handles clipboard data. I have not found a workaround or resolution for this.

Using Facebook creates an "Isolated Web Content" which makes the page run slow then crash.

This has been happening for years, now and means I increasingly just don't use Firefox, switching to Chrome, instead.

This affects Facebook on my Mac (Sequoia) and PC (Windows 11) machines.

The Firefox advertising page

I clicked on the Wellnee link and their site is rigged to extort money! I chose the product (advertised as a discount), entered my bank details then instead of buying the product, I'm sent to a page where aside from just leaving the page, I find that i have to order 3 more of the same product, if I want to get the discount, so I exited the page, only to find that not only had I been charged for the original (without the discount!) but an additional charge had been taken!!!

Then I get a text message saying they couldn't connect to my email, so everything is done through texts (they had my email). When I went to their site they use a fake US phone number; there's no email, only a form (does it work?)

https://shop.trywellnee.com/

The fake US +1(844)961-3766

And why can't I contact Mozilla directly rather than this forum?

Second time asking for help: Firefox "hangs" for 30-60 seconds the first time I open it on my MacBook Pro. Am running Firefox 148.0 (aarch64) on Mac OS Tahoe 26.3.1. This has been going on for three months. Have tried uninstalling Firefox and using AppZap to erase my Mozilla profile from the Mac -- rebooting the Mac -- and re-downloading a fresh copy of Firefox. I shut the Mac down for about an hour, rebooted, and Firefox launched right away. But the next time I launched Firefox on reboot, it "hung" again. Spinning beach ball for about 45 seconds before it then opened its default page at open. I do not run a VPN, and disabled some Safe Browsing "features" of Intego Virus Barrier.I tried to eliminate any other third-party extensions from my Firefox that might cause the delay. Am attaching an image of the extensions Firefox currently uses on the Mac. I absolutely <loathe> Safari, but can't have my Mac use Firefox as a default browser if it "hangs" on first launch. One last thing. Early on in the process, I tried deleting my Mozilla Firefox User Profile, but Firefox refused to start because it couldn't find a profile to launch with. So did not go there on this last attemt. Thanks in advance.

I am using Firefox 148.0 and Mac Tahoe 26.3.1.

When I click on a link in an email, two Firefox windows open. The window to the link opens, along with my homepage window, so two windows are opening in Firefox instead of just the one containing the link address. This is happening when using Thunderbird. However, I have tested this using Apple Mail and Outlook, and the same problem occurs. This problem happens whether I have Firefox already open or not. I have opened the email links with Firefox running in Troubleshoot / Safe mode and the problem persists. I have also cleared Firefox cache / site data / history and the problem concerning email links is still there. This problem arose after installing Firefox 148.0.

Anyone able to help solve this problem? Thank you for taking the time to read this report.

when I click a url link from mail it opens a new firefox window instead of a new tab on existing window. I like to keep all tabs in one open firefox window. Firefox crashed last night and lost all of my tabs; I was able to restore but now having issues with email url links opening in a stand-alone new window - HOW do I revert to former option?

Hi there,

I'm having a strange issue with a website I use for crypto trading. On Firefox the page layout looks broken and some sections overlap or don't load correctly.

The site is paribu.com https://www.paribu.com . When I open the same page in Chrome everything looks normal and the layout loads properly.

I tried refreshing and disabling a few extensions but the issue still happens in Firefox. Has anyone experienced something similar or knows what might cause this?

Thanks.