Recently, I downloaded & installed FIREFOX 62. Ever I have started using it, I have a problem which i do NOT encounter with ANY OTHER browser. FIREFOX turns some on setting of my TWITTER & does NOT allow me to change them as per the attached screen shot. My Safety settings: - Hide sensitive content - Remove blocked and muted accounts Are clicked (pre-selected) & dimmed, I can not uncheck them, while I open CHROME & find them free to check or uncheck. As a result of this problem, I can NOT see any video posted in Twitter using FIREFOX. Yesterday, I posted this same problem here & got a reply asking me to clear the Cache, I did that & the problem disappeared, BUT it APPEARED AGAIN & now can NOT solve it at all, no matter what Cache I clear or anything else. I uninstalled FIREFOX & re INSTALLED it again , BUT THE PROBLEM remains unsolved. Does anybody have any recommendations? Previously, I used earlier versions of FIREFOX and NEVER had this problem. WHAT DOES FIREFOX PRE_SELECT MY TWITTER SAFETY SETTING & PREVENT ME FROM CHANGING THEM. I attach 2 screenshots, one showing the settings (Pre-Selected) by FIREFOX that can NOT be changed & the second showing how videos appear in TWITTER using FIREFOX 62. I CAN NOT SEE ANY Thank you & hope I can get some help