Safari/Browsers - Eliminating browser redirects and advertisements
Safari/Browsers - Eliminating browser redirects and advertisements (2)
Safari/Preferences/Advanced - enable the Develop menu, then go there and Empty Caches. Quit/reopen Safari and test. Then try Safari/History/Show History and delete all history items. Quit/reopen Safari and test. You can also try try Safari/Clear History…. The down side is it clears all cookies. Doing this may cause some sites to no longer recognize your computer as one that has visited the web site.
Go to Safari Preferences/Extensions and turn all extensions off. Quit/reopen Safari and test. If okay, turn the extensions on one by one until you figure out what extension is causing the problem.
When using Malwarebytes, it may be necessary to run more than one scan. After running the scans, restart the computer.