In my daily work a have a lot of situations where I need to access different passwords multiple times. With the current application I have to search, copy-and-paste password, search again, copy-and-paste, search again …
Using tabs or using a last searches history may help to re-use the last searches.
This would be especially helpful since every time you click out/back into the browser extension, you have to research to find the item you were just looking at.
Just to give my personal experience with this would likely be with the current lack of an auto-type feature for filling desktop applications, in which case information has to be manually copy & pasted into the form.