Zodiac Singlefile

One file. Pick a proxy engine in Settings — Scramjet and Ultraviolet use a real service worker (best site compatibility, needs this page served by a normal web server); Sandstone runs sandboxed with no service worker at all. GUST is a separate complete app you can switch into entirely.

Settings
Proxy Engine
Switching engines reloads the page (open tabs are restored after). Scramjet and Ultraviolet need this page served by a real web server — they use a service worker, and browsers won't register one from a blob:/data: URL. Sandstone runs sandboxed with no service worker at all, so it works from a bare static file too, at the cost of weaker site compatibility.