Custom Width on Reddit (share/vote) Button?

I have the Reddit button on my pages and I tried editing the javascript to make a custom width of the button:

write_string += “\” height=\“69\” width=\“50\” scrolling=‘no’ frameborder=‘0’ padding=‘0’ margin=‘0’ style=‘width:50px !important; height:69px !important;’></iframe>";

This is the end of the frame’s write string. I change the width, so the button fits better on my site.

The only problem is that the button shows the right width in all browsers, but Firefox. Firefox sometimes shows the 50px width, while other (most) times it shows the thinner default width.

Anybody have any tips how to prevent this and custom design the reddit share/vote button?