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

Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 0
• Average daily users: 4
• Rating: 0/5 of 0 ratings
• Created: 2018-12-29 21:40:10
• Last updated: 2018-12-29 23:20:07
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/obliterate-fixed/
• API: {6FA9E561-670C-46CA-9D6D-281B961203C7}