It seems Firefox executives take a large chunk of money from Google; presumably to make sure Firefox doesn't do anything too wild that would reduce Googles income.
Firefox is my union representative. They are better able to fight for my interests against Google than should I go it alone and use Chrome.
Its not a perfect system, but it should somewhat work.
Many of us who used it from the start think it was a much better browser before.
For me it was more or less rock solid at >800 tabs and with a lot less memory and more exciting extensions than I have now.
I admit this wasn't everyones experience, but as a superuser tool it has degraded a lot over the years.
It is still the best browser for me: I don't think anyone else except Orion (which is Mac only) has actual tree style tabs (not to be confused with vertical, non indented tabs as seen in Opera derivatives).
I wonder how much of what the Tor Browser version of Firefox does, would be upstreamed to Firefox proper, if not for that deal?
(I wonder how much the Firefox team considers Tor Browser to be "the real Firefox" / "Firefox the way we intended", with Firefox itself just being "the sell-out version of Firefox"?)
* telemetry is evil
* if the product is free (Firefox), you are the product