Hub widget containing an external page/URL

Is there a way to encapsulate an external page into a Widget ?

I would like to create a dashboard that shows info from many other websites, directly referring to their URLs so they can be embedded in a iframe-like mode.

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Official comment

Unfortunately, it's not possible currently.

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You could potentially write your own widget. It's pretty easy to do following the tutorial in the docs.

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I tried creating a custom widget, bu the <iframe> generated by HUB explicitly declares 

sandbox="allow-scripts allow-pointer-lock"

...so the loaded page is not able to use (i.e) cookies and other mandatory features for a "normal" page.

Any idea to overcome this ugly limit ?

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