Pop-out window or open in open in a browser tab
Please add a button in the extension so that it can be popped-out as its own window separate from the browser toolbar or else make it possible to open the password manager in its own browser tab. Currently, if I have information in a different tab or in a different application and I want to copy it between windows, the Proton Pass extension closes itself when I switch away from it. So it makes it extremely difficult to manually copy information into a new note, login, etc. It needs to be a tool that can be accessible aside from just the little extension window please.

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Alexander commented
This was a problem for me too. I found a temporary workaround on firefox and now it can stay open when I click away. It's either temporary as long as the developer console is open (1) or a temporary setting for the current window session (2).
(1) https://stackoverflow.com/q/49076319
(2) https://extensionworkshop.com/documentation/develop/debugging/#debugging-popups -
kmk commented
I use the extension on Brave, and the popup offering to save often has only a tiny sliver showing. Something is overlapping it. So, I trust that the smidgeon of the button in the Proton purple color says to save it to Pass. I can't actually see it though.
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David Houston commented
This is a big usability issue for me, because any entries are lost if you click away from the pop-up, as when creating a new login entry and using the new fields to fill in the website form. I could learn to not click away, but it is not something that comes naturally after using other password managers.