Save Text To File от Robert Byrne

Save text from a web page to a file anywhere on your computer.

Select text, right-click and select "Save Text to File".

Text will be saved to a new file or appended to an existing file, depending on selected options.

Demo
https://www.youtube.com/watch?v=_0GtPLSOAzo

Features:
- Specify any directory to save files on your computer
- Add date of timestamp to saved file name
- Various date formats to choose from
- Save current URL in file
- Optional directory selection dialog on save
- Keyboard shortcut, Ctrl+Shift+Y

Mozilla's "Pick of the Month" for May 2015.