I cannot sign in to my e-mail account on Yahoo.com, which I have been doing for many years on Firefox. Can you help?

Hello cindydenenberg, many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: ''This will temporarily log you out of all sites you're logged in to.'' To clear cache and cookies do the following: #Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history. #Under "Time range to clear", select "Everything". #Now, click the arrow next to Details to toggle the Details list active. #From the details list, check ''Cache'' and ''Cookies'' and uncheck everything else. #Now click the ''Clear now'' button. Further information can be found in the [[Clear your cache, history and other personal information in Firefox]] article. If clearing cookies doesn't work then maybe the '''cookies.sqlite''' file that stores the cookies is corrupted. Try to rename, or delete, '''cookies.sqlite '''(cookies.sqlite.old) and delete also '''cookies.sqlite-journal''' (if exist) in Firefox [https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_how-do-i-find-my-profile profile folder] in case the file cookies are corrupted. Thank you.