Periodically refresh websites, subscribe offline to websites
Conveniently allow Cloud Browser to browse to a website and refresh the cache on a fixed schedule, from a list of "subscriptions" containing commonly visited websites. This would allow completely offline browsing, at the cost of some time lag. Optionally, could upload the static HTML/images to a static web host (GitLab Pages?) served over a CDN, for efficiency and performance.
An idea discussed on https://news.ycombinator.com/item?id=19349447#19351201.