Bugs after Hummingbird

The plugin Hummingbirg works really well already but i have two issues:
- My custom font for menus and texts changed, and I would like to revert it to the previous font without losing benefits of speed your plugin gave.
- I cannot manage to activate browser caching
Could you help me resolving these two issues?

Hope you can help me and we can solve this,

I would really like this site to work fast, I make use of it everyday!

Thank you