I take giant pandas as code for high ranking chinese communists.
six months isn't enough. It should be 1 year plus basic.
if the problem is persistent and browser seems to have been been comped you might have to nuke and pave the browser.
export any bookmarks as a text file and then find and delete every folder related to the browser, and any auto update programs that came with it. then install a new browser, preferably of a different type.