This is wild overreaction. Google is by far the market leader, they pump out innovations in this space, and their decision to work with others mimicing its APIs so that browser extensions can have a level of cross-compatibility is is perfectly nice and pro-competition as you could possibly ask for. I guarantee you if Edge had such a flourishing browser extension marketplace Microsoft would do everything in its power to prevent the other browsers from allowing easy portability.
Yet the actual effect is that the Firefox' browser extension marketplace is severely reduced (by their own descision, admittedly) while Chromes' stays the same for the time being.
