The <wbr> tag is supported in all major browsers, except Internet Explorer.
Definition and Usage
The Word Break Opportunity (<wbr>) specifies where in a text it would be ok to add a line-break.
Tip: When a word is too long, or you are afraid that the browser will break your lines at the wrong place, you can use the <wbr> element to add word break opportunities.
Differences Between HTML 4.01 and HTML5
The <wbr> tag is new in HTML5.
The <wbr> tag also supports the Global attributes in HTML5.
The <wbr> tag also supports the Global Event Attributes in HTML5