How to get rid of "Try the new Twitter profile" box on Twitter

EDIT 20140603: this post is outdated since Twitter forced the new style on every account

ORIGINAL POST:

same thing as this post, You need Firefox, Stylish and create a new style for the domain.

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("twitter.com") {
.ProfilePreviewBanner

{background:none !important;display:none !important}

}

Edit: Added screenshoots as example. notice the icon in the left lower corner:

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("twitter.com") {
.ProfilePreviewBanner

{background:none !important;display:none !important}

}

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("twitter.com") {
.ProfilePreviewBanner

{background:none !important;display:none !important}

}