I know someone already proposed a filter to show only favourites tags. But as explained in one of the answers,
I personnally don't care(and i'm sure i'm not the only one) about the questions that are not about my favourite tags. Not at all. What about a single tag in the ignore section that ignores all the tags that are not in the favourites ?
Something like like
Right now, correct me if i'm wrong, but the only way of recreating this is by adding every tags (+- 35 000) to the ignore list.