Actually the equal-and-opposite thing was more true. They picked up the ball so hard that they believed they could compete with Android with an entire Mozilla mobile operating system. A lot of effort was wasted.

Was referring to the browser, they didn't had an android or ios version until very late in the game. Maybe firefoxOS caused that delay? don't know.

Firefox Mobile came out in 2010 for Maemo. There were more mobile operating systems at the time, and it was less clear which one was going to win out. Mozilla lead with support for the most open option.

The Android version was released a year later, three years after (the frankly pretty unappealing) Android 1.0 release. It was within months of Opera's Android launch. Hardly "very late."