I have used Firefox for years, both out of conviction and to help protect my privacy, even though I often put up with images and forms not displaying on web pages. Then, three times in two months, after restarting Firefox, I found all my tabs, bookmarks and browser history had disappeared. The only thing I did between restarts was to run Wise Care 365 to clear some space on my laptop, something I had done hundreds of times before. The first time the loss occurred I found I had a new profile, a feature I neither wanted nor was consulted about. At least I was able to get back to my original profile. The next two times this proved impossible. Firefox "support" was of no use. Multiple searches produced nothing which helped. After agonising hours, I was able to retrieve my bookmarks and my Firefox browser history through Microsoft Edge. But as a writer and (award-winning) journalist I cannot afford to risk losing my research and links. So although I disapprove of some Microsoft business practices. I am moving to Edge. If I have missed something that makes sense of this, I would be pleased to hear it. In the meantime, Mozilla needs to improve its product and customer service. Wishing its customers well, Francis Shennan