I have a better idea: build a new browser for a new web that is designed with decades of hindsight and isn't as bogged down in all the stupid legacy crap that the current web is.
Then port Chromium to it as a portal to the legacy web.
The most popular browsers in China take a similar approach: they're hybrids of Chromium and Microsoft's Trident engine for legacy pages that require NPAPI plugins. Many ecommerce and banking websites in China require proprietary NPAPI plugins so these hybrid browsers seamlessly switch to Trident for those websites.
