It might not quite match what the original "poster" is looking for, but the Autocopy2 extension combined with Cintanotes quick abilities to receive and paste from clipboard (option to add tags to notes and more) might be an option to consider:
Pasting notes from the clipboard
CintaNotes also supports direct text pasting from the Windows clipboard. Select the “Paste” command from the “Edit” menu or press Ctrl+V. CintaNotes creates a new note with the text from the clipboard. It also tries to determine which application has put the data into the clipboard, and if successful, it uses the application window title as the note’s title. Unfortunately, reliable clipboard data source detection is not always possible, and when CintaNotes fails to find the source window, the first line of the pasted text becomes also the note’s title.
If you are pasting a note that was inserted to the Clipboard from CintaNotes, the Title, Tags and date information will be copied from the original note in addition to the note content.
It is recommended that you use clipping instead of clipboard pasting as much as possible, because in the former case more data can be filled automatically for you.
http://cintanotes.com/help/Personally, i use the middle mouse to paste any given note from CN.
Btw, Autocopy2 is a nice Firefox extension i didn't know about. :Thmbsup:
Do like clipr since it grabs url at same time as selected text (but not needed if using CN):
https://addons.mozilla.org/en-US/firefox/addon/clipr/