I use the Bitwarden Vault Timeout feature set to “On Browser Restart” with Action “Lock” on two browsers. The feature works as it should on one browser but does not work on my Microsoft Edge browser. On Microsoft Edge, Bitwarden stays active, on, and ready to use after I close my Edge browser and restart it later. I have both my Edge “Startup boost” and “Continue running background extensions” settings turned off. Apparently, something in Edge is triggering Bitwarden to think the browser is still open even after I close Edge.
I got around this issue by setting my Bitwarden Vault Timeout to “30 minutes” (timeout could be set to any other hour/minute setting). Now, Bitwarden locks properly after I stop using Bitwarden for at least 30 minutes.