Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
Something to keep in mind about not using browser integrations is that you can fall victim to simple keyloggers and clipboard stealers. But using an extension can also be a weakpoint if it autopopulates incorrectly or on a compromised site; but that's far less common.
But, dear readers, don't let that dissuade you: even a text file in a veracrypt volume is better than "PurpleElephant1994"