I built Code Grabber, a Chrome extension that connects to your Gmail and watches for verification codes. When it finds one, a small popup appears on whatever site you're on, letting you fill it in with the push of a button, no Ctrl-Tabbing needed. The hardest part was making the fill work properly, since some sites are built with React and Vue, and they ignore a simple value change and need the right native input events fired to register it. I'm most proud of the fact that nothing ever happens automatically — the extension only has read-only Gmail access, and every code fill requires the user to say yes to the fill. To test it, download the zip from the website, load it unpacked via chrome://extensions with Developer Mode on, set up a free Google Cloud OAuth Client ID, which can be a bit tricky, but just follow the instructions on the website or README and you should be fine. Then simply connect your Gmail via the toolbar, and the extension will start working. One thing to note is that the extension only checks every minute, but I added a button where you can instantly check for a code in your inbox.
