Hi. In the last few days I have found there may be problems on my Mac. Looks like a trojan or virus injects ads into web-pages. Ads and pop-up ads appears on websites where previously advertising banners have never seen!
If you’re seeing unwanted pop-ups or ads in your web-browser, you might have an adware installed on your computer. Use the following guide to stop pop-up ads and remove malicious software. Or ask for help here.