AI-generated alt-text for images inserted into PDFs
Sounds more like classification so far. Things like summarising web-pages would be properly generative, LLMs in general could be useful to interrogate your browsing history. Doing feature extraction on it, sorting it into a graph of categories not by links, but concepts could be useful. And heck if a conversational interface falls out of that I'm not exactly opposed, unlike the stuff you see on the net it's bound to quote its sources, it's going to tell you right-away that "a cat licking you is trying to see whether you're fit for consumption" doesn't come from the gazillion of cat behaviour sites you've visited, but reddit. Firefox doesn't have an incentive to keep you in the AI interface and out of some random webpage.