EClip shared clipboard
Shared clipboard using Chrome sync storage.
When installed on multiple browsers signed in to the same Google account it monitors clipboard changes and saves current one to synced storage and then retrieves it on other browsers and sets clipboard there accordingly.
After new clipboard content is detected extension icon blinks blue. When new content is received via sync it blinks green.
There is 7000 bytes limit - clipboard longer than that will be truncated.
Clicking on extension icon turns sync off temporarily (icon turns grey). Hovering over icon shows first 40 characters of last synced clipboard.