UPDATE: Since Firefox 57 this add-on no longer works, and because of lack of interest I’ve discontinued it.
You can control the default form focus with this new, premium Firefox add-on. As a long-time KeePass user I often found myself clicking on the same user/e-mail field time and again to begin auto-typing. A few years back I made this to override the default page focus, or lack thereof. Now I’m offering this as a product so you too can take control of Firefox’s form focus.
It can also highlight focused inputs, select input content, and help with voice control by blurring focus so elements can be called out. Upgrades are free for life, and a money-back guarantee is included.
For more information see the product page at PaulRRogers.com/focyoverride.