Looking for an unusual plugin for firefox that kills font size and heading tags

Question

Mozilla Firefox

There are situations when you need to check gmail or look up something important on the Internet, but the client is spinning around the screen, which does not need to be aware of events at all. Accordingly, pressing Ctrl-'-' several times helps to solve the problem, but not with headers and other goodies. Is there a plugin that solves the problem?

Answer 1

I may not quite understand the question, but do you need something like this by any chance? addons.mozilla.org/en/firefox/addon/stylish/
Write custom CSS for the site and enable or disable this plugin with one click when needed.

Answer 2

put greasemonkey
and then do whatever you want with js selectors, bind to the button.