Solved On my site, Firefox has trouble with Message textarea - Seems like whitespace issue

On my testing site, I have installed Kunena 4.
It works well except for Firefox, where I can't properly type in the Message textarea.
Whether I type in the box, or paste text in to the textarea, all whitespace is collapsed.
If I hit the spacebar twice, only one appears. If I hit return, the cursor does nothing but remain on the first line.

I realize there must be something in my Joomla template that is causing this, but I am having a hard time narrowing it down. I was hoping my problem would be obvious for one of your developers, and I could solve this quickly. (note: problem solved, details in reply)

(configuration report deleted)

I have narrowed it down to CSS. In my Joomla template, the CSS performs a browser reset.

If I remove the browser reset, the textarea works again. I shall include the basic browser reset line here for reference.

/* Browser Reset */
a, abbr, acronym, address, applet, article, aside, audio, b, big, blockquote, body, caption, canvas, center, cite, code, dd, del, details, dfn, dialog, div, dl, dt, em, embed, fieldset, figcaption, figure, form, footer, header, hgroup, h1, h2, h3, h4, h5, h6, html, i, iframe, img, ins, kbd, label, legend, li, mark, menu, nav, object, ol, output, p, pre, q, ruby, s, samp, section, small, span, strike, strong, sub, summary, sup, tt, table, tbody, textarea, tfoot, thead, time, tr, th, td, u, ul, var, video { margin: 0; padding: 0; font-size: 100%; font-weight: inherit; font-style: inherit; text-align: inherit; background: transparent; border: 0; font-family: inherit; outline: 0; vertical-align: baseline; white-space: normal; }


I am now going to see if I can fix the problem by choosing white-space: pre

Yep. That did it. Problem fixed.

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