Doing other things (that very few people are interested in or want) does not excuse having a broken browser stay unfixed for years. Firefox is well on its way to being the next IE6.
It's not always about what people are interested or want. Sometimes people give up on their long term interests for short term gain. Mozilla is about the long run.
And if it weren't for Firefox, you'd still be developing for IE6.
I'm sure that they care about those bugs, but right now the major battle for everyone is in the mobile platform area. If Firefox OS doesn't gain a foothold we're basically in walled garden area forever (even though Android is OSS I don't trust Google to not become reactionary once the market is saturated and Android dominates it; and through patents + branding Google can still prevent major forks if it wants to).
So for your own long term sake, you'd better wish that they do make it, even if they have to postpone a few CSS bug fixes.
Mozilla is about the nothing. They are not about the long run, they are conceding control of the browser market to google. Firefox OS is never going to be relevant, will have no impact on phones, and doesn't help anyways. Phones are just computers, we would already have linux, netbsd and openbsd available for them if the hardware were documented. Making a bad OS out of a browser is not solving the problem, because the problem is closed hardware, not closed software. And no, firefox developers do not care about those bugs, they have been open for 7+ years.
And if it weren't for Firefox, you'd still be developing for IE6.
I'm sure that they care about those bugs, but right now the major battle for everyone is in the mobile platform area. If Firefox OS doesn't gain a foothold we're basically in walled garden area forever (even though Android is OSS I don't trust Google to not become reactionary once the market is saturated and Android dominates it; and through patents + branding Google can still prevent major forks if it wants to).
So for your own long term sake, you'd better wish that they do make it, even if they have to postpone a few CSS bug fixes.