Fixes available.

xkit-extension:

I’ve added 4 new subdomains that Yahoo didn’t bother fucking up and updated XKit.

If you are on Chrome

1. Go to Settings from top-right menu (three lines) > Settings > Extensions.
2. Click on Developer Mode if it’s unchecked
3. Click on Update extensions now
4. When XKit reads 7.0.4, return to dashboard

If you are on Firefox

1. Go to the Download page and re-download XKit. 

That should fix it, hopefully.