Interesting that their prototype looks a lot like my browser: which is Firefox using: - Tabcenter Redux (last update 2018) https://github.com/eoger/tabcenter-r

Interesting that their prototype looks a lot like my browser: which is Firefox using: - Tabcenter Redux (last update 2018) https://github.com/eoger/tabcenter-redux-- https://github.com/eoger/tabcenter-redux-- creates a (searchable) left tab column including pinned tabs on top of the column, just like what they are showing. And - Auto Tab Discard -- saves memory (but not perfectly) by writing out tab contents to disk if the tab is inactive for a settable amount of time, then seamlessly reloading the tab when it's clicked.