If you're using Profile Comments, you need to update a template to make sure the style for Chrome/Firefox remains consistent.
Open the member_profile_comments_modbit_delete template in the MyNetwork Template Set. Replace it with the below code.
Code:
<div class="float_left">
<form method="post" action="member.php?action=profile&uid={$comment['uid']}" id="r_f_{$comment['cid']}" onsubmit="a = confirm('{$confirm_title}'); if(a){ ProfileComments.removeComment(this); return false; } return false;">
<input type="hidden" name="view" value="comments" />
<input type="hidden" name="action2" value="remove_comment" />
<input type="hidden" name="comm[{$comment['conv']}][cid]" value="{$comment['cid']}" />
<input type="hidden" name="comm[{$comment['conv']}][conv]" value="{$comment['conv']}" />
<input type="submit" value="" class="button reset" title="{$button_title}" />
</form>
</div>
If you're experiencing problems loading the Comments tab, for example you click on Comments and it doesn't load,
download Profile Comments and re-upload all the files.