“Copy URL to Clipboard.app is not available as a HTTP browser” in El Capitan
The CFBundleURLTypes tag in the Info.plist file just needed a wee bit of a change and now it works on OSX v10.11 El Capitan.

This following worked okay in previous versions but isn't recognised in El Capitan.

&lt;key&gt;CFBundleURLTypes&lt;/key&gt;
&lt;array&gt;
    &lt;string&gt;http&lt;/string&gt;
    &lt;string&gt;https&lt;/string&gt;
&lt;/array&gt;


However if you change it to the following El Capitan recognises it and offers the "Copy URL to Clipboard" application in the "Default web browser" drop-down menu in System Preferences.

&lt;key&gt;CFBundleURLTypes&lt;/key&gt;
&lt;array&gt;
    &lt;dict&gt;
        &lt;key&gt;CFBundleURLName&lt;/key&gt;
        &lt;string&gt;Web site URL&lt;/string&gt;
        &lt;key&gt;CFBundleURLSchemes&lt;/key&gt;
        &lt;array&gt;
            &lt;string&gt;http&lt;/string&gt;
            &lt;string&gt;https&lt;/string&gt;
        &lt;/array&gt;
    &lt;/dict&gt;
&lt;/array&gt;


I've submitted a pull request to houbysoft but in the meantime you can download an updated binary here.