I use Firefox all the time (80.0.1 Mac version), and it is working well.
Maybe I use this occasion for asking another issue. Els, the images on your blog posts are loading very slowly, especially at the first time. This slows down the whole front page. Many times when all the other contents have been already loaded, it continues to load the blog post images, and it can take a long time. This is irritating especially on mobile, and I have quite a fast connections. Are the image file sizes too big or something? I can see the files have been scaled smaller from big sized images, but it also says that the file size is 0 kB.