No, not until now because I don't use Firefox much.
As for rule of the mob mentioned in this article, Leftist Communism(Marxism and Trotskyism) seem to support mob rule or "tyranny of the majority". They see it as positive and refer to mob rule or tyranny of the majority as "The Dictatorship of the Proletariat"(Because the workers are the majority and the majority having complete power). Which includes the power to persecute any minority if the majority agrees on it, this happened to Christians in the Paris Commune.
Think it may have any connection to this?