Makes all headings on a page linkable, so you can save your position on the page for later use (or sharing with someone who has this script installed too).
This is a user script, which requires Grease Monkey* to run.
You can install user script automatically by viewing the script file on GitHub and clicking 'Raw' link. If you have Grease Monkey* addon installed, it will automatically recognize the file as a user script and prompt you with installation dialog.
For more details please refer to the article on user script installation on official wiki.
* or equivalent for platform other than Firefox