From that source, it looks like the story depends on the region though (for desktop). In order of decreasing use of firefox:
* Europe: Firefox overtook IE in 2011 with ~40%
* Africa: Firefox overtook IE in 2012 with ~40%. It looks like Firefox had the best chance of "crushing it" here.
* South America: Firefox overtook IE in 2015 with 12%. Peak was 32% in 2010
* Asia: Firefox overtook IE in 2016 with ~12%. Peak was 28% in 2011
* Oceana: Firefox overtook IE in 2017 with 12%. Peak was 32% in 2010
* North America: Firefox peaked at 30% in 2009 and was half as common as IE until 2015-2016. It still hasn't overtaken IE