Separate and treat "search" history and "form" history as different entities

[bumgarb]

Starting around Firefox 107/108, I started noticing that Firefox was suggesting usernames to me when attempting to enter website credentials.  In the "Privacy & Security" section of settings, I have all "Logins and Passwords" saving and autofill turned off.  I have all "Forms and Autofill" turned off.  So to have Firefox start offering suggestions for login usernames was surprising.

Checking "Saved Logins..." - I have no saved login credentials in Firefox.  Again, very odd that Firefox is suggesting login usernames to me.

I ended up turning off Syncing of my data across devices.  I refreshed the Firefox browser on several devices.  I eventually deleted my profile on several devices.  Deleting profiles temporarily resolved the issue... until I started logging into some of my regular websites again.

I eventually found that Firefox is storing usernames as "form History"  - this itself does not seem correct, but that may be something to do with how individual websites are coded.

Either way, now that I knew how it was saving these logins, I went to find out how to turn it off.  I found this:  https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms

The setting I need to turn off is "Remember search and form history".  I don't like this.  I want to keep my search history - I reference it nearly every day.  I do not want Firefox saving, suggesting, or auto-filling forms or my login credentials.  I consider this something completely separate from my search history.

I think the "Remember search" history should be separate from the "Remember form" history.

[Jon]

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[RJoshField]

I accidentally entered my password vault password in the email field of my vault one time, and Firefox has been suggesting my master password in plain text as a result. This is horrible. It took me so long to figure out that form and search history are bound and hidden. Why these two things are tied together in the first place is vexing. I want search history, I don't want Firefox saving form data when I have it disabled under the relevant section already. This is not only unintuitive, it's outright asinine.

[bumgarb]

That is another great example of why these should be different. I would not want to make a mistake and have my password stored and presented in plaintext.  I'm surprised more people are not complaining about this.

I ended up turning of "Remember search and form history" which sucks to lose my search history.  Funny thing is, Firefox has continued to offer login credentials that are not stored in the Password Manager.  

@RJoshField You can try going to Privacy & Security > History > Clear History.  Set "When" to "Everything".  Leave "Saved form info" CHECKED and then UNCHECK all the other check boxes.  Then click the "Clear" button.  So far that seems to have stopped the suggestions of credentials (I think).