Version 57. The 570th time that Firefox has forced users to update because the previous version was using so much memory it was rendering the entire Windows 10 operating system unusable. Finally after 48 hours of wasting time resetting all our settings so that Firefox has all of our links and regularly used material available, only to find that Firefox has broken another valuable web resource: the entire Vimeo website, full of films and videos that we use. Not only can we not see the material there, but the material there that WE have uploaded to Vimeo is now unavailable to people unless they are so eager to see it that they will save the link, shut down Firefox and use Chrome. I cannot understand, nor can anyone else, why FIrefox would release another version of its browser that disables major portions of the internet. Yet Mozilla does this repeatedly. It couldn't make both Flash and HTML5 work; it had to destroy the enormous usefulness of the huge quantity of material that is now online over a period of 20 years in Flash format. Thanks a lot.