I left Firefox for political sentiments that most of you do not share, judging from past conversations here. There are enough people like me that those events l

I left Firefox for political sentiments that most of you do not share, judging from past conversations here. There are enough people like me that those events likely continue to put downward pressure on their market share. But not all that much in the big scheme of things. The larger effect of those politics was a change in leadership. Firefox used to be led by a passionate, opinionated technologist with a clear and consistent vision. His replacement, while more politically palatable, seems to have a weaker grasp of the market and the technology. The direction of the browser's market share reflects that. CEOs are non-fungible. The primary "author" of Firefox changed, and that had a similar effect to the change in author of the final season of Game of Thrones.