Looks like compatibility hacks for various websites.
Interventions - are deeper modifications to make sites compatible. Firefox may modify certain code used on these sites to enforce compatibility. Each compatibility modification links to the bug on Bugzilla@Mozilla; click on the link to look up information about the underlying issue.
User Agent Override - change the user agent of Firefox when connections to certain sites are made.
https://wiki.mozilla.org/Compatibility/UA_Override_&_Interventions_Testing
I want Roland Emmerich to make a movie out of the short story A Pail of Air.
tl;dr/spoiler: ~20 years ago, a black hole passed through the solar system and captured the Earth, dragging it inexorably away from the Sun. This causes great earthquakes, tsunami, and other immediate civilization-ending catastrophes, but the real disaster comes when the atmosphere freezes and falls like snow to the ground. The original story follows a young boy born after the cataclysm whose chores include collecting buckets of frozen air.