AngularJS data binding values directly into href

I'm not sure if this is a bug with AngularJS, Firefox, Chrome or whether it's simply a quirk...however,

When I do something like this

<a href="#/{{list.UUID}}/{{routeParams.status}}"> ...

In Chrome I get the values binding through correctly e.g.

...#/fa778108-5a0c-4675-974e-4cae0d9d6a86/active`

But in Firefox I get this

... #/{{list.UUID}}/{{routeParams.status}}

Anyone know why this is the case?

The "solution" I have found is to use <a ng-href=" ... but I'd still like to know why it doesn't work consistently...