blog/source/_posts/aliexpress-no-login-firefox.md

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How to solve 'Cannot login to AliExpress on Firefox' 2019-02-28 00:00:00
firefox

AliExpress login doesn't show up on Firefox. This is due to X-Frame-Options restriction. Here's how to whitelist it.

When you try to login to AliExpress on Firefox, the login box is just blank.

{% cloudinary 20190228/no-login.png %}

When I inspected the element (right click on the blank login and select ``Inspect Element), the login box is an iframe of https://passport.aliexpress.com. From the Web Console (Ctrl + Shift + K`), the following error message suggested it's caused by X-Frame-Options.

{% cloudinary 20190228/iframe.png %}

{% cloudinary 20190228/x-frame.png %}

From the Network inspection (Ctrl + Shift + E), https://passport.aliexpress.com has HTTP header x-frame-options: SAMEORIGIN. This restricts the iframe to the same domain. This caused the iframe unable to load because it's different from the login page https://login.aliexpress.com.

{% cloudinary 20190228/sameorigin.png %}

Ignore X-Frame-Options Firefox extension is a way to whitelist the domain from the restriction. By default, the extension whitelist all domains. This is highly discouraged because it nullifies the security benefits of x-frame-options (e.g. prevent a banking website from being iframe-d inside a phishing website). Instead, we can whitelist the login page only.

https://passport.aliexpress.com/*

{% cloudinary 20190228/whitelist.png %}

That's how the whitelist works on the extension; you add the domain of the iframe not the page's domain. After you add it to the list, refresh the page and you should see the login.

{% cloudinary 20190228/login.png %}