''<p>mdt1504 [[#question-1485763|said]]</p>'' <blockquote>Having trouble signing into yahoo mail on my laptop </blockquote> What does that mean? Can you post a screenshot showing the issue? I can log into my yahoo. see screenshot Did you try with Firefox in [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf Troubleshoot Mode]? Did you clear your browser cache? https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

Could be a browser issue try clearing cache/cookies or using a different one. Also make sure your system clock is correct and check if Yahoo's asking for an app password (especially if you're using an older email client).