There are times when using a mouse is not an option and you ask yourself, “How do I navigate a website without a mouse?” Someone without the full use of his or her hands will often have to use the computer keyboard or a special input device.
On websites that comply with WCAG 2.0, the TAB key in conjunction with the ENTER (i.e. RETURN) key and the arrow keys should get a user to all of the interactive elements of a web page.
There are also key code combinations that will help you focus on other browser windows and tabs. For example on a Mac, to return to the browser tab you were on previously, you can hold down the command key (⌘) while typing the opening square bracket ( [ ). For a full list of Mac keyboard shortcuts visit:
https://support.apple.com/en-us/HT201236
Windows keyboard shortcuts can be found at:
https://support.microsoft.com/en-us/help/12445/windows-keyboard-shortcuts
Microsoft has a good cheat sheet for Linux keyboard shortcuts:
https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf
If you know of any other resources, please include them in the comments below.