bbPress problem (not responsive)

I amended with this additional CSS :

pre {
	white-space: pre;           /* CSS 2.0 */
	white-space: pre-wrap;      /* CSS 2.1 */
	white-space: pre-line;      /* CSS 3.0 */
	white-space: -pre-wrap;     /* Opera 4-6 */
	white-space: -o-pre-wrap;   /* Opera 7 */
	white-space: -moz-pre-wrap; /* Mozilla */
	white-space: -hp-pre-wrap;  /* HP Printers */
	word-wrap: break-word;      /* IE 5+ */
	}

Is this correct ?
Is there a better solution ?

Hi again.
In fact my css changed nothing : firmasite only working in non responsive mode whith me.
Is there something I do wrong ?

Well..
There is an option Make fixed. No responsive in Theme Customizer -> Theme Settings. That makes the theme act as non-responsive. Just disable it. Its normally disabled but you probably didnt read it and activated it.

You opened a different topic on support forum too:
https://theme.firmasite.com/support/topic/firmasite-not-responsive-on-my-site/

Lets continue from there.