If you're wondering how this is different from Vimium and friends, there are 2 main things:

1. Shortkeys makes it very easy to create/customize your own in the GUI, no matter how tech-savvy you are, and it doesn't ship with any default shortcuts.

2. Shortkeys tries to fix the "it doesn't work when you have the URL bar or a new tab page focused!" problem by supporting native browser extension shortcuts as much as possible. More info on that here: https://github.com/mikecrittenden/shortkeys/wiki/FAQs-and-Tr...