It's not the schedule. It's the process.
When chrome updates to a new version, I don't even know about it and everything just works (including all my addons). When Firefox updates, I have to wait an additional few seconds while it updates, I have to close out a splash page informing me of all the new features that I won't use and I have to figure out how to update and re-enable my all addons which have now magically turned off.
When I open a web browser, I want to do something. If you get in my way of me doing something for 30 seconds every few weeks plus spend 5 minutes trying to get selenium or other addons up and running again, you have failed at your purpose as a web browser.
It is even worse when you have a scenario where you have a few dozen firefox installs across various VMs.. I dread FF updates now because it means that I'm either reimaging test machines or going through a bunch of updates.