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 see things that cause issues. Please update your video card drivers. Old drivers cause issues. Have nothing else as have no info. So it is a guessing game. https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Delete all google cookies and clear your cache. If this is a old system and motherboard drivers and such have never been updated and having any performance issues should change to the Extended Release Version 52.4.1 https://www.mozilla.org/en-US/firefox/organizations/all/ It gets security updates but that is it. SO with out info you get a lot of this and that. Note : Firefox 57 Quantum release date Nov 14th https://www.mozilla.org/en-US/firefox/quantum/ Note : Legacy Extensions will be disabled and or removed. Please let us know if this solved your issue or if need further assistance.