They went form 90%+ market share down to 9%- since taking Google money.

The allegation of throwing is too light. They’re complicit in covering for Google’s obvious monopoly.

Your ratios are correct but your numbers are off. Mozilla peaked at around 35% of market share and is now around 3%.

You’re not wrong, but people get this mixed up because Firefox was a continuation of Netscape which did have a 90+% market share in 95. Mozilla however is a completely independent entity that continued to work on an open sourced browser created by a different entity.