So here's my use case:
I would like to create my own personal&business dashboard every time I open new tab, as I need instant access to my 5 favorite websites (say it's GMail, JIRA, Google Analytics, Trello, Medium.com draft page). I tried with embedding them with IFrame, but failed:
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Seems Vivaldi browser is closest to what I am trying achieve with their 'split tabs' feature, but maybe there is a Chrome extension I missed?