I don't have a Twitter account, but I read them. But for the last couple of months, when I go into one, I get a big Twitter window that says, "Don't miss what's happening," and I have to x out of it. I get that window every time I go into someone's Twitter. Also, if I click on a tweet to read the comments, that window comes up again, and when I x out of it, I get back to the main twitter page, not the individual tweet with the comments. Also, if I click on something that's embedded in a tweet - like a news article - same thing happens. I get that big window. I x out of it, but again it takes me back to the main twitter page. So I can't read the article. (I could go to that particular Tweet's link, and read the comments or article, but I shouldn't have to do that.) I was always able to read the comments and click embedded articles within a tweet. I never had to sign in - never had a Twitter account. This is not happening at all in Chome or Edge, only Firefox, so it's a Firefox issue. What's going on?