Sometimes, it's just not worth the effort. Seriously would you rather:

A) Get invovled in a lengthy back and forth, potential legal proceedings with a billion dollar company.

or

B) Listen to the message being sent, be pragmatic, and then get on with building things.

Depends if it's existential, like I said. If my whole company depends on X and replacing it is intractable, there's not much other choice. Having looked at the landing page though, seems like they can just go with other models and it will (largely) be fine, yes.

FireFox need to improve their integrations and offerings to be on par with Chrome at this stage. It, at times can be such a bainful browser to use and honestly I don't think a VPN is the next step. Improved account handling & switching would be huge.

I'm not sure what you mean by account handling, but you can long-press the new tab, and you can choose a different profile (for example "work") which has a differently-colored tab. It's pretty great.