This dialog box states "An attempt to change your home page and default search has been blocked" & 'click to change these settings'. After clicking the 'close {X}' button, the box won't leave my screen., where it blocks ALL activity. Meaning, not only does the dialog box cover the entire upper left corner of my screen (on my Mac, blocking access to all window button choices). It, literally, is blocking ALL screen activity more than 3"-4" AROUND/larger than the actual dialog box size. Moving windows around just so I can access the window buttons, though clear from 'under/being covered by' the dialog box, the buttons still do not accept being clicked, until inches far away from box. Even though it appears to be fully cleared and away from the box. When I switch to another application, like the finder or to a full screen video playing, your dialog box still remains, blocking everything 'under' and 'around' it. It will not go away, even after I went to my preferences and re-chose to original settings. PLEASE ASSIST ASAP AS THIS IS VERY ANNOYINGLY SCREWING WITH MY WORK-FLOW - SEE PIC! Unfortunately, your browser won't upload a 49K screen shot of this anomaly.