Firefox is not the devil, but “ideologies aside”, the basic idea is:

1. (Just like microsoft), They’ve could just decide to put it in one of the “many” variant of product, name it FoxAI, let the users decide and call a day. Instead, they’ve decided to force a very heavy component like that on the main version out of blue.

2. Switched or not. Now, you will have ‘way’ more bloat on a browser, which should be focused on speed and performance.

3. The whole thing about AI on free stuff is getting as much data as possible to train. You have to trust them to switch it off completely.