Under X11/X.org, the middle click pastes a text selection that was made using the left mouse button. This buffer is separate from ctrl-c ctrl-v in the browsers, and the functionality works in git master at the "rename notebook" prompt, for example, but not for the input cells.
This effects both Firefox and Chrome in my testing so far.
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4