Virtual x86 - copy
https://copy.sh/v86Virtual x86. Arch Linux 12 MB. A complete Arch Linux restored from a snapshot, additional files are loaded as needed. Damn Small Linux 50 MB. Graphical Linux with 2.4 kernel, Firefox 2.0 and more. Takes 1 minute to boot. Buildroot Linux 5.0 MB. Minimal Linux with busybox, Lua, tests, internet access, ping, telnet and curl.
Virtual Browser by Browserling
https://www.browserling.com/virtual-browserA virtual browser is a web browser that runs in a virtual machine. Compared to a browser that's installed on your own system, a virtual browser is physically separated from your system. The biggest advantage of a virtual browser is that it's not linked to your usual browsing activities and all cookies, files, local storage, browser history, and extensions stay in the virtual machine.