Nothing to install. The file moves while both browsers stay open.
Same local network: Local. Somewhere else: Remote. Local can be a cable or wireless.
Read the four-character code, or send a link that lasts 60 seconds. On Remote, the code refreshes every 60 seconds until someone uses it.
Drop a file or a folder. The other side chooses where to save. Both windows stay open.
Once connected, you can send a short note. The note also stays between the two browsers.