I use Ctrl+L very often to quickly focus on the address bar of my browser, to Google and to find something in my browsing history, and I've always imagined having a keyboard shortcut to focus on the search-box on the webpage.
Search Shortcut, consisting of 63 lines of JavaScript, binds the Ctrl + Y key to the search-box on the webpage. That's pretty much it.
- Firefox
https://addons.mozilla.org/en-US/firefox/addon/search-shortc...
Chromium/Google Chrome:
https://chrome.google.com/webstore/detail/search-shortcut/cm...
Hope you enjoy it too!
P.S. I couldn't test in on Mac and Windows so apologies for any shortcut conflicts. :)