Reddit is terrible as a website. But it still has the communities that developed there over years, and they are an invaluable resource. They are definitely positioning themselves to pull a Digg, but until the Reddit-killer comes along with a mass exodus (and it doesn’t look like it’s gonna be Lemmy unfortunately) access to those communities will entail dealing with reddit.
Sadly no, ever web app company definitely doesn’t test under Firefox. I’m at the point where I use Firefox for general web browsing and Chromium for most web apps.