This only works for Firefox!
Stackedit is a fantastic text editor, with a minor annoyance: your text documents are not in your file system. This little script takes care of extracting the text files from Firefox's profile directory.
The only dependency is click:
pip install click
Just locate the webappsstore.sqlite which should be inside your Firefox profile. Then, run:
python extract.py path/to/your/webappsstore.sqlite
All the contained Stackedit text documents will be extracted to the output/ directory.