I have a Mac PC running the latest OS. I have used Firefox for years and have my bookmarks saved. I recently tried to open Firefox and it doesn’t open. The icon in the tray makes one bounce but never opens. I download Firefox again. It put a second icon in my tray and I was able to use the browser and it had my bookmarks loaded. I restarted my computer and the second icon is gone and I cannot open Firefox from original icon. Any suggestions on how to use Firefox again and keep my bookmarks.