Forum width messed up

Technical Details

Forum version : #phpBB2
Position : Member
Concerned browser(s) : Mozilla Firefox
Screenshot of problem : https://i.imgur.com/VA9ippq.jpg
Who the problem concerns : A few members
When the problem appeared : After a change to the CSS was made
Forum link : http://www.warriorcatsnl.com/

Description of problem

Hello,

Yesterday I have made a few changes to a forum of a friend of mine, solving a problem they had with the avatars in the Toolbar. The code I added was this:

Code:

#fa_usermenu img{
max-width: 150px  !important;
    max-height: 100px  !important;
}

After that the forum changed for Firefox users, pushing it out of width. Weird thing is, is that not ALL Firefox users are experiencing this problem. I don't understand what is wrong and I want to fix this.

How the forum should look on Chrome:

How the forum looks in Firefox:

Try adding the following to your CSS:

Code:

.theme-default .nivoSlider {
 
max-width: 710px !important;

left: 32px;

}