Currently you need to be on the beta list though, since it costs Gemini API credits to run (though a quite trivial amount)—if you (or anyone else) DMs me an email I can add you to the list, and at some point if I have time I might enable payments such that it’s generally available.
There’s a version now that was audited by Chrome Web Store, if that’s enough for you: https://chromewebstore.google.com/detail/objective/dckljlpogfgmgmnbaicaiohioinipbge?authuser=0&hl=en-GB
Currently you need to be on the beta list though, since it costs Gemini API credits to run (though a quite trivial amount)—if you (or anyone else) DMs me an email I can add you to the list, and at some point if I have time I might enable payments such that it’s generally available.