Classic #OperaBrowser had an interesting approach: since it couldn't guarantee, despite all efforts, perfect compatibility with websites that weren't designed around web standards but “for specific browsers”, it provided a menu option to open in a different browser any page you were in. I don't think I've seen such a feature in any other browser, but I think it's actually the simplest solution to the diverging paths for the two webs.

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Under this analysis, browsers like @Vivaldi are in a very precarious situation: on the one hand, #VivaldiBrowser is being developed under what is arguably a “web of documents” mindset, and in fact more in general as a “Swiss knife of the Internet”, similarly to classic #OperaBrowser (I've already written about this at length). On the other hand, its reliance on the #Google-controlled #Blink engine that is designed for the “web of apps” cripples it in its efforts:

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