How do I disable form autosubmit?

Ah, I was just coming here to post about this and saw this from earlier this morning. Yes!, Pease, please, please allow us to turn auto-submit off. It's driving me mad. There are just too many cases where I want to do something after auto-filling:

• I tend to fire auto-fill pretty quickly after loading a page, often before I notice there's a "stay logged in" checkbox that I want to turned on. With auto-submit, I miss the opportunity to toggle it, which means I have to log in again next time I go to the site/app, at which point I repeat the cycle. It's vicious -- takes me a dozen-plus tries to break it sometimes. (Yes, I'm very dense. Or really, just very routine-driven.)

• I have multiple logins for many things, many logins for a few. As a result, I sometimes choose the wrong one. Up through v7, this wasn't a big deal - I would simply look to see which account got filled and redo it if necessary. Now, I'm slammed into the account whether it's the right one or not, which means I have to wait for the site/app to load, find the logout function and click it, then try it all again. And in some cases (especially when SSO is being used), switching accounts doesn't always work reliably, which means it might take a few tries or even force clearing cookies or switching browsers. And with direct support for contexts outside the browser, there are all new unintended consequences that can happen, like downloading content to the machine with Dropbox or similar, accidentally purchasing an app with the wrong account in the App Store (thus locking it to the wrong account), or accidentally saving a file to the wrong account (MS Office). And some of those unintended consequences can have further consequences with one's employer, compliance, etc.

• Some sites have secondary controls that appear as you're going through the login process; this is the OP's point. Sometimes, these are on the first page and visible right off the bat, which means I can deal with them if I'm not moving too quickly (see first item above). However, at other times, they only become visible once you fill in the username portion, or worse, they're only visible on the second or third page of a multi-step login process. In these cases, the only thing I can do is go back to my mid-'90s pre-password manager days and copy/paste the credential.