Firefox "html.css" destroys the current page style, how to disable it?

Question

"html.css" is very mysterious to me, it always appears and suddenly disappears when it appears, it always destroys my page style and remains sticky there until God knows when it will disappear

Is there any way to disable it? How?

Add: I found that the problem occurs not only in my system, but also in the guest OS, so I think I should find the reason and fix it, since it can also appear on the computer of site visitors.

Answer 1

html.css - Firefox.

, ?

, reset ,

• reset
• YUI reset
• .

Answer 2

firefox , , html.css , - .

, <form> <table>, display:table-row ( w3c validator). firebug, , html.css. <form> <table> ( ), html.css.