I typed this into Google: "stop all animated gifs everywhere forever"
And the top 3 results were...
You can't stop animated gifs in Chrome (there are add-ons, but they disable at the drop of a hat) and nor in Firefox (a bug has disabled the about:config option for about a year now). And... nobody seems to care. You damn kids with your bouncy, movey picutres. Get off my <s>internet</s> lawn.
Seriously... animated gifs are one of the fastest ways to get me to close a window and never return to the site. There are days that I close dozens of io9 articles because the screen becomes a spastic annoyance.
Yes. I'm a cantankerous old coot.