The content providers start blocking firefox from accessing their content. It will eventually be easier to use chrome, IE, or whatever instead of using a work around to keep on firefox. It will lose a large portion of its user base and then its funding as it won't bring in as much from default search provider contracts etc
There is no simple answer. The only thing I can suggest is to just stop using Netflix until someone cracks it, or they decide to stop using DRM. This isn't your fault, it's Netflix and Hollywood's fault, their use of DRM is blackmail on their entire customer base. As in the case of any blackmail, the best option is to stand your ground and not give in.
