Implement an option to Open and Fill by default

May I ask if you have two different browser profiles, or are you signing into two different Google Accounts (or any account) in a single browser session?

No, I don't have separate browser profiles.  I'm referring to using multiple accounts on the same service within a single browser session/profile.

Can you tell me more about the use case for this feature, why this would benefit our customers, and how you'd imagine the feature to work?

Sure.  For example, there are multiple sites within my company that are all on the same domain that I access, some of which use dedicated logins.  Because of the way that the default domain matching works, logins for all of the sites show up in the login suggestion list.  As such, the 2nd+ site I want to access requires either opening a new tab first and then re-searching 1Password for the appropriate login item, or finding it from the suggestion list on the already accessed site and then choosing Open and Fill on the URL in the entry rather than Autofill on the suggestion entry (because the option changes dynamically on the suggestion entry depending on whether you're already on a tab that matches the domain for a login item).

Now, for internal/company sites that have their own specific A record, this isn't as much of an issue because I could potentially change the domain matching to be exact match only, but is still an issue for the sites that use the same login entry (i.e., a single login entry with multiple URLs listed).

Where this is more of an issue, is for sites that do not have their own A records to be able to do exact matching, such as when you manage multiple clients that all use the same service but under their own respective accounts, and their portals are only separated by login info.

The suggested item entries already have the ability to dynamically change their buttons based on your active browser tab - I'm basically just asking for a way to stop that behavior and statically set the button to always be Open and Fill, regardless of what your active tab is.