windows 7 - Even though FireFox portable is set as default browser, it doesn't launch when I press the keyboard key to launch web browser

I want to use Firefox portable as my main browser. I noticed when I use the shortcut key built into the keyboard to launch the web browser, something strange happens. A version of Firefox opens up but it doesn't have the same home page and doesn't have add ons that I have added to the portable edition. I checked the control panel and there are no installations of Firefox (which makes sense because the portable edition wouldn't show up there anyways). This is what I mean by keyboard shortcut key shortcut key circled in red

How can I launch Firefox portable (with all it's normal features and settings) from pressing the button on the keyboard?

This is the keyboard used. I checked the manufacturers website and it doesn't appear to have any drivers.

Here's a picture: FireFox portable - with all the add ons and proper home page. I can only get this by clicking on the shortcut button. has add ons

When I press the key built into the keyboard to launch the web browser this loads, and all the settings are different

missing addons

I noticed that if I already have FireFox portable open and press the key on the keyboard to launch the default web browser, than a new FireFox portable window opens that has all the right settings and add ons.

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