Haven't found but one problem so far, and that is with an addon. LastPass works perfectly but WOT is flakey. Works but if a site brings up another browser tab for something I get a Windows Explorer error. If I clear the error then the tab loads. I use all the no tracking addons that don't conflict, Smart Filter, and ActiveX filtering and haven't come across any other problems browsing. I have to disable no tracking and ActiveX filtering to get all of a site to load occasionally but I only do it for sites I am reasonably sure about.