It has, yeah. Wasn't it behaviour added to Firefox once some years ago? I recall a situation where my less technical other half was struggling to submit a form

It has, yeah. Wasn't it behaviour added to Firefox once some years ago? I recall a situation where my less technical other half was struggling to submit a form because of this behaviour. Granted, it was due to a poor implemention that didn't support two dropdowns where one depended on the other, but it was confusing and annoying. As a developer it's annoying because it slows down testing - again edge case, but I've seen it before, and it annoyed me. If it was the standard behaviour and all controls were sensitive to it, that would probably be different. There's also the security aspect to keep in mind. So now when someone comes back to a page on your machine, might they see something you didn't want them to see?