Because Mozilla, at least from the outside appears to have been horribly mismanaged for the past 20-25 years and only survived because the ad money kept rolling in.

I'm not knocking Mozilla for taking money from Google, it was a smart move. Most users would use Google anyway, so Mozilla pocketing billions by making users preferred search engine the default didn't really hurt anyone. Some of that money should however have gone into a trust or some type of investment so that funding for browser development would be safe if the ad money ever dried up.

Maybe someone at Mozilla knows something I don't, but there doesn't seem to be much planning for the future.

> Firefox haven't caved in so far. Why do u think it might in future?

Because pretty much all their revenue comes from Google.

Mozilla Foundation is more interested in spending money on anything else than making Firefox genuinely better.

If money gets short, the first thing they would cut would be a browser.