I tried to create a test single column full page web-tab but all it shows is a blank page. I went to create>tabs>web tabs. Am I missing something? Following is the link I tested for the web-tab...
Any help will be appreciated.
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This is because the Mozilla server has set a header to indicate that it does not allow the content to be embedded in an iframe - this is typically used to avoid clickjack attacks. If you use something like the Chrome Inspector, you will see the error:
There's more detail on the X-Frame-Options header at:
There is nothing wrong about your tab, here if you check error in browser it is like:
You can try with replace url : https://developer.salesforce.com/forums?id=906F00000008jqBIAQ It is working!