Five Hidden GitHub features that will make it much easier to contribute to open source

 1. Whitespace

Adding ?w=1 to a git diff URL will hide all changes in the whitespace, enabling you to see only the code that has changed.

2. The Github dev web-based editor GitHub's web-based editor allows you to navigate a repository's files and source code to make, and commit, code changes. You can open any repository, fork a repository, or open a pull request in the editor.

3. Octotree Octotree is a browser extension that enhances GitHub code review and exploration. It helps you navigate directories and open files with a familiar tree-like structure.

https://chrome.google.com/webstore/detail/octotree-github-code-tree/bkhaagjahfmjljalopjnoealnfndnagc

4. w & t Navigate your project quickly. On your repository’s home page, type ׳w׳ to quickly bring up a quick filter panel for your branches. Inside your repository, type ׳t׳ to jump into a quick file selector. Select your file and just hit 'Enter'.

5. Commit History by Author To view all the commits on a repo by author, `add ?author={user}` to the URL.