How to remove tooltips on sites in Firefox?

Question

Browsers

Hello!
Please help to solve the problem of pop-up hints in Firefox.
The parameter about:config -> browser.chrome.toolbar_tips -> false helped to remove them only in the lines of tabs and bookmarks, but they are still displayed on sites...
https://cloud.mail.ru/public/6Pbt/Uw3SaJf1F
In advance thank.

Answer 1

install the Stylish add-on in firefox.
and cut your style, depending on the code of the site you are viewing.
it is possible and more convenient to do this by writing a script for Greasemonkey