You can right click any password field in Chrome and the first option is “generate random password”.
2 Issues are the they (1) it is completely unreadable by humans instead of being a passphrase, and (2) The generator does not read any rules off the page so you might have to add a special character.
But the functionality has existed for over a decade
CucumberFetish@lemmy.dbzer0.com 1 week ago
Firefox generates random passwords for you by default. You have to disable it in the settings if you want to use another password manager besides Firefox’s built in one.