I don't actually use it anymore in the same manner, because I found that every so often my password manager 1Password's autocomplete will mess up in Brave, the browser I use for Amazon and FB access, so I use a single script to launch those two websites in Brave, in Incognito mode, and I just use a keyword to launch, and then the following AppleScript. (See photo).
If you want to access a password manager as well, then you just need to add a time delay after the AppleScript, to give the page time to load, then an AppleScript that will tab you to the correct windows, activate your hotkey for auto fill for your password manager, and hit return. I found using Alfred's time delay and a second AppleScript more reliable than building in time delays directly into the AppleScript.
I'm not familiar with AppleScript, I just learned enough to get something to work for me, so if someone else can make better suggestions, I'm all ears.