Please consider turning on send info to Mozilla before posting a question. This helps us help you. As I have no info from your system that would help. Suggest you use a Adblocker. Try Ublock Origin https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/ and can run this at same time or just one Ghostery https://addons.mozilla.org/en-US/firefox/addon/ghostery/ You can limit who and what ads get through and from whom. Please let us know if this solved your issue or if need further assistance.