After enabling the Add-on for dynaTrace, to see the dynaTrace toolbar, you must go to the View menu in the browser, click Toolbars, then find and select "dynaTrace Toolbar".
Now it appears and you can connect to dynaTrace.
If you click to connect to dynaTrace and later find that the Agent Mapping is incorrect, you'll find that the Agent Mapping field is grayed out and cannot be modified. Simply close the browser and re-open it to disconnect from dynaTrace so that you can modify the Agent Mapping, then click Connect.
Additional information regarding the Browser Agent can be found on http://apmcommunity.compuware.com.
Once logged in, go to the following links: