Firefox 29 and IE 11 have Glow problems

So this problem has been going on for a while now, while it works fine on both Chrome and Opera, Firefox and IE does not show the glow on usernames (Only contest winners get a glow if they choose so) and it's been bugging me since I still can't find a solution to this problem by trying to fix it from my basic knowledge to going on here and finding a similar problem.

The forum is http://believeinwinx.forum-motion.com/ I am a moderator on there. 

Please help!

Hello,

Could you please provide the code which you use to give these users their "Glow" ?

Thanks

I will provide you with that as soon as one of the admins get on since I don't have access to it. However I want to mention that a friend of mine also has Firefox but it works for him.

With that being said, the problem is definitely caused by my browser/laptop but I do not know what the cause is. I will still provide you with the code once I get my hands on it. (:

Thank you.

Edit: Apparently my friend also has the problem and was confused. I'm still waiting for an admin to get on and hand it to me but I'd like to provide you with a screenshot of Firefox and Chrome.

Chrome:

Firefox:

(Taken at different times, sorry for that but you can clearly see that Chrome has the glow applied on the usernames while Firefox doesn't.)

Nevermind that, I have taken a look at the forum stylesheet and located an error. This rule right here is causing the problem.

Code:

th {
 color: #000000;
 font-size: 12px;
 font-weight : bold;
 background-color: #000000;
 height: 25px;
 background-image: url("http://i.imgur.com/MjsAXk3.png);
 padding: 2px 3px;
 border-top-left-radius: 15px;
 border-top-right-radius: 15px;
 }

In the background image declaration the string was never closed in the url :
background-image: url("https://i.imgur.com/MjsAXk3.png);

It should look like :
Anything between quotes is a string. Write one quote character to open a string and a quote at the end to close the string.
background-image: url("https://i.imgur.com/MjsAXk3.png");

Now because of this small error, if the string is not closed everything after that seems to be interpreted as a part of that string. You should notify the board Admins of this so they can resolve the issue.

Many thanks for the additional info

Thank you so much, I'll check up on this with the admins and see if it gets solved or not! ^^