I had the same thing. It was some software that downloaded when I downloaded some other software. Go to your control panel and to programs and features and uninstall it.
You have adware. Download the free version of Malwarebytes (no need to use the pro or the trial version) and remove the malware. It is reading your personal information and highlighting text accordingly.
Be sure to run a full scan. That may take hours
And this software works very well - I have used it for many friends who picked up adware.