Panasonic's promises of Firefox OS-based TVs in 2014 didn't amount to much, but the company is back with much more concrete plans for Mozilla's web-based platform. The electronics giant has revealed that all of its 2015 Life+Screen 4K TVs (the CX600, CX650, CX800 and CX850) launching this spring will run Firefox OS. You can not only run web apps, but also send content to your TV from any device with a Firefox browser or a compatible app. You'll even get notifications from smart appliances connected to your home network, Panasonic says. It's hard to know if the new software will help Panasonic compete with the likes of LG's webOS sets or Samsung's Tizen models, but it's clear that simply making a smart TV isn't enough in the tech world these days -- you need to have a full-fledged software ecosystem to back it up.