Step 1: Click on Code on this repo (top right green button)
Step 2: Click Download ZIP
Step 3: Open up the ZIP file on your computer
Step 4: Go to Extensions on your browser
Step 5: Make sure Developer Mode is turned on
Step 6: Click Load Unpacked and choose the files you downloaded
Step 7: Try opening up a new tab.
Step 8: Click "Keep" when prompted in your new tab.