If you install a newer Firefox, how do you disable this behavior? Because these ideas are terrible.
Keep your original search visible
Use a search bar.
You can access different search modes in the address bar using simple, descriptive keywords like @bookmarks, @tabs, @history, and @actions
So you still have keyword searches. That's what you've re-invented. We've had that since, what? v0.9? Except now there's an @
Whereas before your address bar was filled with long, confusing URLs, now...
How many times do we have to keep re-inventing these dangerous UX ideas that make it easier and easier to fool the unaware?
Type a command, and Firefox takes care of it
So if I want to know how to delete one or a few downloads, and search for something like "delete downloads", it will now delete everything I ever downloaded? Who wanted this feature?
Cleaner URLs with smarter security cues
So I will know that bankofameric.com is secure in that it uses https, but not in that it's not the same as bankofamerica.com? (That's right, Cyrillic "".)
Let me guess, you also let javascript/WebAPIs change the search term in realtime, because someone somewhere said "maybe someone can use this...?"?
Making single form that 1) identifies wherever the hell you're supposed to be, 2) gives a shallow-to-the-point-of-being-false impression of security, and 3) performs actions that affects your workspace and files is just insane.
Mozilla has moved well past setting money on fire for things no one wants. Now they do it for things I would actually pay money to never experience. ...
Wait, is that their new marketing plan?