I'm no expert on this but I'm guessing this is all related to the coding (javascript, html, etc.) Firefox has an add-on so maybe you can get an idea of what it takes to show the real password as it's typed.
https://addons.mozilla.org/en-US/fir...show-password/
Those asterisks, dots, whatever, are there to keep people from looking over your shoulder and stealing your password. Some folks have extra long PWs that sometimes get misspelled. A simple alternative (
IF no one is looking over your shoulder!) is to type it in clear text in your address bar, verify spelling, and then copy/paste it into the password field. Just a thought.