See in the left side the table of content of the readme file in the github project page
This extension shows a table of content generated from the README file of any GitGuh project’s root page.
It is very handy to jump through the sections without scrolling manually up and down or use the browser search action at the same time that you have to remember how it is called.
It is open source released under MIT and Creative Common, check link to GitHub project
Change log: https://github.com/ifraixedes/browser-extension-github-readme-toc/blob/master/CHANGELOG.md