Why do people think a dozen eggs costs $12?
A quick search turned up this 18 count of eggs for $9 at our local chain. And that was just the first result I found that had the price on the page (you have to click a button to see it, unfortunately, but it is there).
Same here. What especially irritated me was that even though I installed the .deb firefox and followed the directions to disable snap firefox, occasionally Ubuntu went ahead and reinstalled snap firefox for me.