That's what I thought too (ie. that Google is critically dependent on web browsers that don't discriminate against Google somehow, and is paying for two such browsers). But so many people say that Chrome and Firefox are competitors that I'm curious to hear arguments for that.
Owning a browser is a business as every search engine wants to be the default. I think google is forking several billions a year to be the default on Safari and is probably Firefox’ primary source of revenues.
I don’t know if Microsoft has any other motivation for Edge other than being the front end for Bing.
