Obliterate-Fixed от Michael Ebert

Annoyed at popups and unnecessary floating menu bars? This add-on removes them from the sites you specify.
There are many extensions that do something similar, but this one:

• has a whitelist
• runs automatically when page is loaded
• runs for 5 seconds (once per second) to catch elements that are loaded after a delay

Permissions needed:
Access your data for all websites: need to remove elements from all websites