As noted by @Tsyoka, The popular Firefox community project Librewolf has stated that they will not be adding these AI features to their browser. (https://codeberg.org/librewolf/issues/issues/1919)
Even in the most idealistic situation, AI is still currently a tool that very few users will actually take advantage of on a daily basis. Most users just want a browser that is unobtrusive. The reality of the situation is that AI is extremely expensi...