<label><inputtype="radio"name="mode"value="blacklist"id="mode-blacklist"> Black-list mode: Apply user-agent string to all tabs except the tabs with the following top-level hostnames (comma separated list of hostnames)</label>
<label><inputtype="radio"name="mode"value="whitelist"id="mode-whitelist"> White-list mode: Only apply user-agent string to the tabs with following top-level hostnames</label>
<label><inputtype="radio"name="mode"value="custom"id="mode-custom"> Custom mode: Only apply user-agent string to the tabs with a matching top-level hostnames.</label><ahref="#"id="sample">Insert</a> a sample.