Add a buglist for people in the Firefox group.

Benjamin, please let me know if there's anything you'ld like me to add or change to make this suitable for merging.

Thanks!

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The ability for the options to take up (only) as much space as they need while giving the rest of the space to the summary, and letting the summary cut itself off with ellipses if it's too long…
(I'm re-doing that layout in the next styling pass, but I'm not sure what it'll end up as yet.)